diff --git a/apps/server/src/api-data/report/__tests__/report.service.test.ts b/apps/server/src/api-data/report/__tests__/report.service.test.ts
index ab9edcd84..415ee90ee 100644
--- a/apps/server/src/api-data/report/__tests__/report.service.test.ts
+++ b/apps/server/src/api-data/report/__tests__/report.service.test.ts
@@ -22,6 +22,16 @@ vi.mock('../../../services/report-service/report.store.js', () => ({
       runs[index] = run;
     }
   }),
+  upsertRuns: vi.fn(async (updated: ShowRun[]) => {
+    for (const run of updated) {
+      const index = runs.findIndex((candidate) => candidate.id === run.id);
+      if (index === -1) {
+        runs.unshift(run);
+      } else {
+        runs[index] = run;
+      }
+    }
+  }),
   deleteRun: vi.fn(async (id: string) => {
     const index = runs.findIndex((run) => run.id === id);
     if (index === -1) return false;
@@ -39,9 +49,21 @@ vi.mock('../../../services/report-service/report.store.js', () => ({
 }));
 
 let currentRundown = makeRundown({ id: 'rundown-1', title: 'Test rundown' });
+/** rundowns reachable by id, standing in for what is on disk */
+let storedRundowns: Record<string, ReturnType<typeof makeRundown>> = {};
 
 vi.mock('../../rundown/rundown.dao.js', () => ({
   getCurrentRundown: vi.fn(() => currentRundown),
+  getCurrentRundownId: vi.fn(() => currentRundown.id),
+}));
+
+vi.mock('../../../classes/data-provider/DataProvider.js', () => ({
+  getDataProvider: vi.fn(() => ({
+    getRundown: vi.fn((id: string) => {
+      if (!(id in storedRundowns)) throw new Error(`Rundown with id: ${id} not found`);
+      return storedRundowns[id];
+    }),
+  })),
 }));
 
 const {
@@ -70,9 +92,13 @@ beforeEach(async () => {
     order: [eventA.id, eventB.id],
     flatOrder: [eventA.id, eventB.id],
   });
+  storedRundowns = { 'rundown-1': currentRundown };
   await initReports('project-a');
 });
 
+/** an epoch instant, as the runtime would supply on the first event start */
+const showEpoch = Date.UTC(2026, 7, 8, 9, 30);
+
 describe('triggerReportEntry()', () => {
   it('captures a snapshot of the schedule when an event starts', () => {
     const state = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 500 }, clock: 500 });
@@ -118,6 +144,14 @@ describe('triggerReportEntry()', () => {
     expect(generate()).toEqual({});
   });
 
+  it('ignores a stop arriving when no run is open', () => {
+    // a project load stops playback and reinitialises reporting, the trailing
+    // stop must not attribute the old project's event to the new one
+    const state = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 0 }, clock: 10000 });
+    triggerReportEntry(TimerLifeCycle.onStop, state);
+    expect(generate()).toEqual({});
+  });
+
   it('persists a run to history on the first event stop', async () => {
     const start = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 0 }, clock: 0 });
     triggerReportEntry(TimerLifeCycle.onStart, start);
@@ -132,6 +166,67 @@ describe('triggerReportEntry()', () => {
   });
 });
 
+describe('run timestamps', () => {
+  it('dates a run with the wall clock epoch, not the time of day', async () => {
+    // clock/actualStart are millis since midnight, which cannot date a run.
+    // The run must take _startEpoch so it is not stamped 1 Jan 1970.
+    const state = makeRuntimeStateData({
+      eventNow: eventA,
+      timer: { startedAt: 0 },
+      clock: 34200000, // 09:30 as a time of day
+      rundown: { actualStart: 34200000 },
+      _startEpoch: showEpoch,
+    });
+    triggerReportEntry(TimerLifeCycle.onStart, state);
+    triggerReportEntry(TimerLifeCycle.onStop, { ...state, clock: 44200000 } as typeof state);
+    await new Promise((resolve) => setImmediate(resolve));
+
+    const run = listRuns()[0];
+    expect(run.startedAt).toBe(showEpoch);
+    expect(new Date(run.startedAt).getUTCFullYear()).toBe(2026);
+  });
+
+  it('falls back to the current instant when no start epoch is available', async () => {
+    const before = Date.now();
+    const state = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 0 }, clock: 0, _startEpoch: null });
+    triggerReportEntry(TimerLifeCycle.onStart, state);
+    triggerReportEntry(TimerLifeCycle.onStop, { ...state, clock: 10000 } as typeof state);
+    await new Promise((resolve) => setImmediate(resolve));
+
+    const run = listRuns()[0];
+    expect(run.startedAt).toBeGreaterThanOrEqual(before);
+    expect(run.startedAt).toBeLessThanOrEqual(Date.now());
+  });
+
+  it('orders runs from different days correctly', async () => {
+    // a run at 09:30 today must rank above one at 20:00 yesterday, which
+    // time-of-day ordering would get backwards
+    const yesterdayEvening = Date.UTC(2026, 7, 7, 20, 0);
+    await makeClosedRunAt('older', yesterdayEvening);
+    await makeClosedRunAt('newer', showEpoch);
+
+    expect(getLatestRun()?.id).toBe('newer');
+  });
+
+  async function makeClosedRunAt(id: string, epoch: number) {
+    // the time of day deliberately disagrees with chronological order here:
+    // 20:00 yesterday is a larger time of day than 09:30 today
+    const timeOfDay = epoch % 86400000;
+    const state = makeRuntimeStateData({
+      eventNow: eventA,
+      timer: { startedAt: 0 },
+      clock: timeOfDay,
+      rundown: { actualStart: timeOfDay },
+      _startEpoch: epoch,
+    });
+    triggerReportEntry(TimerLifeCycle.onStart, state);
+    triggerReportEntry(TimerLifeCycle.onStop, { ...state, clock: timeOfDay + 10000 } as typeof state);
+    closeRun();
+    await new Promise((resolve) => setImmediate(resolve));
+    runs[0] = { ...runs[0], id };
+  }
+});
+
 describe('closeRun()', () => {
   it('closes the open run and starts a fresh one on the next event', async () => {
     const start = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 0 }, clock: 0 });
@@ -197,6 +292,85 @@ describe('initReports()', () => {
     const recovered = getRun('dangling');
     expect(recovered?.endedAt).toBe(9000);
   });
+
+  it('closes every dangling run, not only the first', async () => {
+    runs = [makeDanglingRun('first', 4000), makeDanglingRun('second', 7000)];
+
+    await initReports('project-a');
+
+    expect(getRun('first')?.endedAt).toBe(4000);
+    expect(getRun('second')?.endedAt).toBe(7000);
+    expect(listRuns().every((run) => run.endedAt !== null)).toBe(true);
+  });
+
+  function makeDanglingRun(id: string, endedAt: number): ShowRun {
+    return {
+      id,
+      rundownId: 'rundown-1',
+      rundownTitle: 'Test rundown',
+      label: id,
+      startedAt: showEpoch,
+      endedAt: null,
+      report: {
+        [eventA.id]: { startedAt: 0, endedAt, scheduledStart: 0, scheduledDuration: 10000, playCount: 1 },
+      },
+      summary: {
+        eventsRun: 1,
+        eventsPlanned: 2,
+        scheduledDuration: 10000,
+        actualDuration: endedAt,
+        drift: endedAt - 10000,
+        eventsOver: 0,
+        eventsUnder: 1,
+        eventsOnTime: 0,
+        worstOverrun: null,
+      },
+    };
+  }
+});
+
+describe('summary is measured against the run\'s own rundown', () => {
+  it('counts planned events from the rundown the run belongs to', async () => {
+    // a three event rundown that is not the loaded one
+    const otherEvent = makeOntimeEvent({ id: 'event-c', timeStart: 0, timeEnd: 1000, duration: 1000 });
+    storedRundowns['rundown-2'] = makeRundown({
+      id: 'rundown-2',
+      title: 'Other rundown',
+      entries: { [eventA.id]: eventA, [eventB.id]: eventB, [otherEvent.id]: otherEvent },
+      order: [eventA.id, eventB.id, otherEvent.id],
+      flatOrder: [eventA.id, eventB.id, otherEvent.id],
+    });
+
+    // open a run against rundown-2, then switch the loaded rundown away
+    currentRundown = storedRundowns['rundown-2'];
+    const state = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 0 }, clock: 0, _startEpoch: showEpoch });
+    triggerReportEntry(TimerLifeCycle.onStart, state);
+    currentRundown = storedRundowns['rundown-1'];
+
+    triggerReportEntry(TimerLifeCycle.onStop, { ...state, clock: 10000 } as typeof state);
+    await new Promise((resolve) => setImmediate(resolve));
+
+    // three, from rundown-2, not two from the now loaded rundown-1
+    expect(listRuns()[0].summary.eventsPlanned).toBe(3);
+  });
+
+  it('keeps the last known count when the rundown has been deleted', async () => {
+    currentRundown = makeRundown({ id: 'gone', title: 'Deleted rundown', entries: {}, order: [], flatOrder: [] });
+    const state = makeRuntimeStateData({ eventNow: eventA, timer: { startedAt: 0 }, clock: 0, _startEpoch: showEpoch });
+    triggerReportEntry(TimerLifeCycle.onStart, state);
+    triggerReportEntry(TimerLifeCycle.onStop, { ...state, clock: 10000 } as typeof state);
+    await new Promise((resolve) => setImmediate(resolve));
+
+    // rundown disappears from both the loaded slot and storage
+    const runId = listRuns()[0].id;
+    runs[0] = { ...runs[0], summary: { ...runs[0].summary, eventsPlanned: 7 } };
+    currentRundown = storedRundowns['rundown-1'];
+
+    triggerReportEntry(TimerLifeCycle.onStop, { ...state, clock: 20000 } as typeof state);
+    await new Promise((resolve) => setImmediate(resolve));
+
+    expect(getRun(runId)?.summary.eventsPlanned).toBe(7);
+  });
 });
 
 describe('run history queries and edits', () => {
diff --git a/apps/server/src/api-data/report/report.service.ts b/apps/server/src/api-data/report/report.service.ts
index f0d28f8af..8e6132032 100644
--- a/apps/server/src/api-data/report/report.service.ts
+++ b/apps/server/src/api-data/report/report.service.ts
@@ -3,6 +3,7 @@ import {
   OntimeEventReport,
   OntimeReport,
   RefetchKey,
+  Rundown,
   ShowRun,
   ShowRunSummary,
   TimerLifeCycle,
@@ -11,9 +12,11 @@ import { countPlannedEvents, generateId, getRunSummary } from 'ontime-utils';
 import { DeepReadonly } from 'ts-essentials';
 
 import { sendRefetch } from '../../adapters/WebsocketAdapter.js';
+import { getDataProvider } from '../../classes/data-provider/DataProvider.js';
+import * as timeCore from '../../lib/time-core/timeCore.js';
 import * as reportStore from '../../services/report-service/report.store.js';
 import { RuntimeState } from '../../stores/runtimeState.js';
-import { getCurrentRundown } from '../rundown/rundown.dao.js';
+import { getCurrentRundown, getCurrentRundownId } from '../rundown/rundown.dao.js';
 
 /** per event data for the run currently in progress */
 const report = new Map<EntryId, OntimeEventReport>();
@@ -83,6 +86,13 @@ export function triggerReportEntry(
   }
 
   if (cycle === TimerLifeCycle.onStop) {
+    // With no run open there is nothing this event can belong to. A stop can
+    // still arrive here after a project load, and recording it would attribute
+    // the previous project's event to the newly loaded one.
+    if (openRun === null) {
+      return;
+    }
+
     const previous = report.get(eventId);
     report.set(eventId, {
       startedAt: previous?.startedAt ?? null,
@@ -109,7 +119,7 @@ export function closeRun() {
 
   // detach the run before the async write so a start arriving in between
   // opens a new run instead of appending to the one we are closing
-  const closing = { ...openRun, endedAt: lastEndedAt() };
+  const closing = { ...openRun, endedAt: lastEndedAtIn(generate()) };
   openRun = null;
 
   void persistRun(closing, generate());
@@ -131,18 +141,33 @@ function openRunIfNeeded(state: DeepReadonly<RuntimeState>) {
   formattedReport = null;
 
   const rundown = getCurrentRundown();
-  const startedAt = state.rundown.actualStart ?? state.clock;
+  // `clock` and `rundown.actualStart` are times of day, which cannot date or
+  // order a run across days. `_startEpoch` is the wall clock instant the show
+  // began, which is what a run needs to be a dated record.
+  const startedAt = state._startEpoch ?? timeCore.now();
 
   openRun = {
     id: generateId(),
     rundownId: rundown.id,
     rundownTitle: rundown.title,
-    label: new Date().toISOString(),
+    label: makeRunLabel(startedAt),
     startedAt,
     endedAt: null,
   };
 }
 
+/**
+ * Default name for a run, a readable local date and time rather than the
+ * raw timestamp the user would otherwise have to decipher.
+ * @private
+ */
+function makeRunLabel(startedAt: number): string {
+  return new Date(startedAt).toLocaleString(undefined, {
+    dateStyle: 'medium',
+    timeStyle: 'short',
+  });
+}
+
 /**
  * Writes the run in progress to the sidecar.
  * Persisting on every event stop means an interrupted show still leaves a record.
@@ -160,8 +185,12 @@ async function persistOpenRun(): Promise<void> {
  * @private
  */
 async function persistRun(run: Omit<ShowRun, 'report' | 'summary'>, currentReport: OntimeReport): Promise<void> {
-  const rundown = getCurrentRundown();
-  const eventsPlanned = countPlannedEvents(rundown.entries, rundown.flatOrder);
+  const rundown = getRundownForRun(run.rundownId);
+  // a rundown deleted mid-run leaves nothing to count against, so we keep
+  // whatever the run was last written with rather than reporting zero
+  const eventsPlanned = rundown
+    ? countPlannedEvents(rundown.entries, rundown.flatOrder)
+    : (reportStore.getRun(run.id)?.summary.eventsPlanned ?? 0);
 
   await reportStore.upsertRun({
     ...run,
@@ -171,17 +200,22 @@ async function persistRun(run: Omit<ShowRun, 'report' | 'summary'>, currentRepor
 }
 
 /**
- * Timestamp of the last event to finish in this run
+ * Resolves the rundown a run belongs to.
+ * The loaded rundown can be switched while a run is open, so the run's own
+ * id is the only reliable way to count the events it was measured against.
  * @private
  */
-function lastEndedAt(): number | null {
-  let latest: number | null = null;
-  for (const entry of report.values()) {
-    if (entry.endedAt !== null && (latest === null || entry.endedAt > latest)) {
-      latest = entry.endedAt;
-    }
+function getRundownForRun(rundownId: string): Readonly<Rundown> | null {
+  if (rundownId === getCurrentRundownId()) {
+    return getCurrentRundown();
+  }
+
+  try {
+    return getDataProvider().getRundown(rundownId);
+  } catch (_error) {
+    // getRundown throws when the rundown no longer exists
+    return null;
   }
-  return latest;
 }
 
 /**
@@ -196,14 +230,28 @@ export async function initReports(projectFilename: string): Promise<void> {
 
   await reportStore.loadReports(projectFilename);
 
-  const dangling = reportStore.getRuns().find((run) => run.endedAt === null);
-  if (dangling) {
-    const endedAt = Object.values(dangling.report).reduce<number | null>((latest, entry) => {
-      if (entry.endedAt === null) return latest;
-      return latest === null || entry.endedAt > latest ? entry.endedAt : latest;
-    }, null);
-    await reportStore.upsertRun({ ...dangling, endedAt });
+  // close every run left open, not just the first: a run stuck with a null
+  // endedAt reads as ongoing forever and is skipped by getLatestRun
+  const closed: ShowRun[] = [];
+  for (const run of reportStore.getRuns()) {
+    if (run.endedAt !== null) continue;
+    closed.push({ ...run, endedAt: lastEndedAtIn(run.report) });
   }
+  await reportStore.upsertRuns(closed);
+}
+
+/**
+ * Timestamp of the last event to finish within a stored report
+ * @private
+ */
+function lastEndedAtIn(storedReport: OntimeReport): number | null {
+  let latest: number | null = null;
+  for (const entry of Object.values(storedReport)) {
+    if (entry.endedAt !== null && (latest === null || entry.endedAt > latest)) {
+      latest = entry.endedAt;
+    }
+  }
+  return latest;
 }
 
 /** Run history for the current project, without per event data */
diff --git a/apps/server/src/services/report-service/__tests__/report.store.test.ts b/apps/server/src/services/report-service/__tests__/report.store.test.ts
index 65c7a6adc..9adf1dea1 100644
--- a/apps/server/src/services/report-service/__tests__/report.store.test.ts
+++ b/apps/server/src/services/report-service/__tests__/report.store.test.ts
@@ -44,6 +44,7 @@ const {
   getRuns,
   getRun,
   upsertRun,
+  upsertRuns,
   deleteRun,
   deleteRunsForRundown,
   deleteAllRuns,
@@ -140,6 +141,35 @@ describe('upsertRun() / getRun() / getRuns()', () => {
   });
 });
 
+describe('upsertRuns()', () => {
+  beforeEach(async () => {
+    await loadReports('project-a');
+  });
+
+  it('applies several runs in a single write', async () => {
+    await upsertRuns([makeRun({ id: 'a' }), makeRun({ id: 'b' })]);
+
+    expect(getRuns().map((run) => run.id)).toEqual(['b', 'a']);
+    const written = files.get(getPathToReports('project-a')) as { runs: ShowRun[] };
+    expect(written.runs).toHaveLength(2);
+  });
+
+  it('mixes inserts and replacements', async () => {
+    await upsertRun(makeRun({ id: 'existing', label: 'before' }));
+    await upsertRuns([makeRun({ id: 'existing', label: 'after' }), makeRun({ id: 'fresh' })]);
+
+    expect(getRuns()).toHaveLength(2);
+    expect(getRun('existing')?.label).toBe('after');
+  });
+
+  it('does not write when given nothing to do', async () => {
+    await upsertRun(makeRun({ id: 'a' }));
+    await upsertRuns([]);
+
+    expect(getRuns()).toHaveLength(1);
+  });
+});
+
 describe('deleteRun()', () => {
   beforeEach(async () => {
     await loadReports('project-a');
diff --git a/apps/server/src/services/report-service/report.store.ts b/apps/server/src/services/report-service/report.store.ts
index 53e633cb0..8ab409896 100644
--- a/apps/server/src/services/report-service/report.store.ts
+++ b/apps/server/src/services/report-service/report.store.ts
@@ -71,11 +71,26 @@ export function getRun(id: string): ShowRun | undefined {
  * Inserts or replaces a run, keeping the list ordered newest first
  */
 export async function upsertRun(run: ShowRun): Promise<void> {
-  const index = cache.runs.findIndex((candidate) => candidate.id === run.id);
-  if (index === -1) {
-    cache.runs.unshift(run);
-  } else {
-    cache.runs[index] = run;
+  return upsertRuns([run]);
+}
+
+/**
+ * Inserts or replaces several runs in one pass.
+ * Batching matters: these all live in a single file, so writing per run would
+ * mean concurrent writes racing on the same path.
+ */
+export async function upsertRuns(updated: ShowRun[]): Promise<void> {
+  if (updated.length === 0) {
+    return;
+  }
+
+  for (const run of updated) {
+    const index = cache.runs.findIndex((candidate) => candidate.id === run.id);
+    if (index === -1) {
+      cache.runs.unshift(run);
+    } else {
+      cache.runs[index] = run;
+    }
   }
   await persist();
 }
diff --git a/packages/types/src/definitions/core/Report.type.ts b/packages/types/src/definitions/core/Report.type.ts
index 290d742ab..ad85b0332 100644
--- a/packages/types/src/definitions/core/Report.type.ts
+++ b/packages/types/src/definitions/core/Report.type.ts
@@ -41,9 +41,17 @@ export type ShowRun = {
    * is renamed or deleted.
    */
   rundownTitle: string;
-  /** user editable, defaults to a formatted timestamp */
+  /** user editable, defaults to a formatted local date and time */
   label: string;
+  /**
+   * Wall clock instant (milliseconds from epoch) the run began.
+   * Not a time of day: runs must be datable and orderable across days.
+   */
   startedAt: number;
+  /**
+   * Time of day the last event in the run finished, or null while the run is
+   * open. Only ever compared against the per event times in the same run.
+   */
   endedAt: MaybeNumber;
   report: OntimeReport;
   summary: RunSummary;