diff --git a/Services/ServiceTrackerService.cs b/Services/ServiceTrackerService.cs
index 088b0b4..c0dab5a 100644
--- a/Services/ServiceTrackerService.cs
+++ b/Services/ServiceTrackerService.cs
@@ -9,7 +9,14 @@ namespace Disco.Plugins.ServiceTracker.Services
 {
     public class ServiceTrackerService
     {
-        public const string PluginVersion = "1.5.5";
+        public const string PluginVersion = "1.5.6";
+
+        /// <summary>
+        /// Status values that mean a ticket is closed/done. Checked against the saved StatusOverride
+        /// for NTT tickets so that manually resolved/dismissed sheet jobs don't reappear.
+        /// </summary>
+        private static readonly string[] ClosedStatusKeywords = new[] { "resolved", "dismissed", "complete", "closed", "done", "cancel", "finished" };
+
         private readonly DiscoDataContext _database;
         private readonly ServiceTrackerDataStore _dataStore;
         private readonly ServiceTrackerConfig _config;
@@ -42,7 +49,19 @@ namespace Disco.Plugins.ServiceTracker.Services
                         var ext = _dataStore.LoadExternalTickets(); var el = ext.ToDictionary(t => t.JobId, t => t);
                         foreach (var e in sr.Tickets)
                         {
-                            ServiceTicket st; if (!el.TryGetValue(e.InternalId, out st))
+                            ServiceTicket st; el.TryGetValue(e.InternalId, out st);
+
+                            // Skip if the ticket has been manually closed/resolved/dismissed in the tracker,
+                            // even if the sheet row still appears open.
+                            if (st != null && !string.IsNullOrEmpty(st.StatusOverride))
+                            {
+                                var ov = st.StatusOverride.ToLower().Trim();
+                                bool manuallyClosed = false;
+                                foreach (var kw in ClosedStatusKeywords) { if (ov.Contains(kw)) { manuallyClosed = true; break; } }
+                                if (manuallyClosed) continue;
+                            }
+
+                            if (st == null)
                             { st = new ServiceTicket { JobId = e.InternalId, Source = "ntt", PriorityId = GoogleSheetService.MapPriority(e.RawPriority), LocationId = _config.DefaultLocationId, AssignedTechId = ResolveSheetTech(e.AssignedTo), Summary = e.IssueDescription, EstimatedCompletion = e.PreferredDate, CreatedDate = e.Timestamp, LastModifiedDate = DateTime.Now }; _dataStore.SaveExternalTicket(st); el[e.InternalId] = st; }
                             tiles.Add(BuildSheetTile(e, st)); sheetCount++;
                         }