Index: lams_central/web/includes/javascript/authoring/authoringActivity.js
===================================================================
diff -u -r67be53719f1603c1f06c0d1ec33eaaf866de43a2 -r8b07361616a84041e46ce81176f84026e1fc7136
--- lams_central/web/includes/javascript/authoring/authoringActivity.js	(.../authoringActivity.js)	(revision 67be53719f1603c1f06c0d1ec33eaaf866de43a2)
+++ lams_central/web/includes/javascript/authoring/authoringActivity.js	(.../authoringActivity.js)	(revision 8b07361616a84041e46ce81176f84026e1fc7136)
@@ -229,6 +229,10 @@
 		this.groupingType = groupingType || 'random';
 		this.groupDivide = groupDivide || 'groups';
 		this.groupCount = +groupCount || layout.conf.defaultGroupingGroupCount;
+		if (groups && groups.length > this.groupCount) {
+			// when opening a run sequence, groups created in monitoring can be more numerous then the original setting
+			this.groupCount = groups.length;
+		}
 		this.learnerCount = +learnerCount || layout.conf.defaultGroupingLearnerCount;
 		this.equalSizes = equalSizes || false;
 		this.viewLearners = viewLearners || false;