diff --git a/Api.SeaHavenIndustries.Tests/DashboardUnassignedTests.cs b/Api.SeaHavenIndustries.Tests/DashboardUnassignedTests.cs
index dbdbc7e..b3cc03e 100644
--- a/Api.SeaHavenIndustries.Tests/DashboardUnassignedTests.cs
+++ b/Api.SeaHavenIndustries.Tests/DashboardUnassignedTests.cs
@@ -152,6 +152,9 @@ public class DashboardUnassignedTests
     {
         using var ctx = NewContext();
         Seed(ctx);
+        // Dated outside the board's all-weeks window: neither side may count them.
+        ctx.workOrders.AddRange(Wo(11, new DateTime(1999, 12, 31)), Wo(12, new DateTime(2100, 1, 1)));
+        ctx.SaveChanges();
         var user = AccountUser(1);
 
         var stats = await NewDashboard(ctx).GetStatsAsync(
diff --git a/SeaHaven.DataServices/Helpers/WorkOrderBoardQueryFilters.cs b/SeaHaven.DataServices/Helpers/WorkOrderBoardQueryFilters.cs
index b665f2c..d4810ca 100644
--- a/SeaHaven.DataServices/Helpers/WorkOrderBoardQueryFilters.cs
+++ b/SeaHaven.DataServices/Helpers/WorkOrderBoardQueryFilters.cs
@@ -5,6 +5,14 @@ namespace SeaHaven.DataServices.Helpers
 {
     public static class WorkOrderBoardQueryFilters
     {
+        /// <summary>
+        /// The window the Work Orders board searches when no date range is selected
+        /// (client ADVANCED_SEARCH_ALL_WEEKS_FROM/TO), used with includeDateless.
+        /// Counts that drill into that list use it too, so both see the same rows.
+        /// </summary>
+        public static readonly DateOnly AllWeeksFrom = new(2000, 1, 1);
+        public static readonly DateOnly AllWeeksTo = new(2099, 12, 31);
+
         public static IQueryable<WorkOrder> ApplyBaseScope(IQueryable<WorkOrder> query)
             => query.Where(w => w.istemplate != true && (w.IsDeleted != true || w.IsDeleted == null));
 
diff --git a/SeaHaven.DataServices/Implementation/DashboardDataService.cs b/SeaHaven.DataServices/Implementation/DashboardDataService.cs
index 7f9767f..02362a2 100644
--- a/SeaHaven.DataServices/Implementation/DashboardDataService.cs
+++ b/SeaHaven.DataServices/Implementation/DashboardDataService.cs
@@ -61,8 +61,15 @@ namespace SeaHaven.DataServices.Implementation
             query = WorkOrderBoardQueryFilters.ApplyDispatcherFilter(
                 query, new[] { "__unassigned__" }, myWorkOrders: false, currentUserId: null);
             query = WorkOrderBoardQueryFilters.ApplyStatusFilter(query, OpenLifecycleStatuses);
-            if (dateFrom is DateOnly from && dateTo is DateOnly to)
-                query = WorkOrderBoardQueryFilters.ApplyDateRangeFilter(query, from, to);
+            // All time counts what the board lists with no range: every week plus
+            // undated work, so the tile and its drill-down agree (SH-392).
+            query = dateFrom is DateOnly from && dateTo is DateOnly to
+                ? WorkOrderBoardQueryFilters.ApplyDateRangeFilter(query, from, to)
+                : WorkOrderBoardQueryFilters.ApplyDateRangeFilter(
+                    query,
+                    WorkOrderBoardQueryFilters.AllWeeksFrom,
+                    WorkOrderBoardQueryFilters.AllWeeksTo,
+                    includeDateless: true);
 
             return await query.CountAsync(cancellationToken);
         }