Only look for relevant blocks on the same real grid.

ActionSequencer/Program.cs

@@ -20,7 +20,7 @@ namespace IngameScript
 
             // initialize all the sequencers
             List<IMyTerminalBlock> blocks = new List<IMyTerminalBlock>();
-            GridTerminalSystem.GetBlocksOfType(blocks, block => MyIni.HasSection(block.CustomData, "sequencer"));
+            GridTerminalSystem.GetBlocksOfType(blocks, blockFilter);
 
             foreach (IMyTerminalBlock block in blocks)
             {
@@ -173,5 +173,10 @@ namespace IngameScript
             Console.Print($"Can't add unsupported block '{block.CustomName}'");
             return null;
         }
+
+        public bool blockFilter(IMyTerminalBlock block)
+        {
+            return block.IsSameConstructAs(this.Me) && MyIni.HasSection(block.CustomData, "sequencer");
+        }
     }
 }