diff --git a/lib/src/form/src/controller.dart b/lib/src/form/src/controller.dart
index ec3a6f9..7b60036 100644
--- a/lib/src/form/src/controller.dart
+++ b/lib/src/form/src/controller.dart
@@ -196,10 +196,22 @@ class AstromicFormController extends FormController {
   }
 
   int getInstanceCount(String targetGroupID) {
+    String? p = getFullPathOfGroup(targetGroupID);
+    if (p != null && p.split('->').length > 1 && p.split('->').indexOf(targetGroupID) != 0) {
+      // This is a subgroup
+    }
     FormGroupStructure? structure = getGroupStructure(targetGroupID);
     if (structure != null) {
       String firstField = structure.fields.first;
-      return controllers.keys.where((String c) => RegExp(standeredGroupFormat(targetGroupID, r'[\d+]', firstField)).hasMatch(c)).nonNulls.toList().length;
+      // return controllers.keys.where((String c) => RegExp(standeredGroupFormat(targetGroupID, r'[\d+]', firstField)).hasMatch(c)).nonNulls.toList().length;
+      return controllers.keys
+          .where((String c) {
+            // Match the specific group ID and field name within the group
+            final RegExp pattern = RegExp(r'^' + RegExp.escape(standeredGroupFormat(targetGroupID, r'[\d+]', firstField)) + r'(-#\d+)?$');
+            return pattern.hasMatch(c);
+          })
+          .nonNulls
+          .toList().length;
     }
     return 0;
   }