diff --git a/enrol/manual/yui/quickenrolment/quickenrolment.js b/enrol/manual/yui/quickenrolment/quickenrolment.js
index 81774afab73..f57c75dfc8f 100644
--- a/enrol/manual/yui/quickenrolment/quickenrolment.js
+++ b/enrol/manual/yui/quickenrolment/quickenrolment.js
@@ -154,6 +154,11 @@ YUI.add('moodle-enrol_manual-quickenrolment', function(Y) {
             }
 
             this.get(UEP.BASE).one('.'+CSS.SEARCHOPTIONS+' .'+CSS.COLLAPSIBLEHEADING).one('img').setAttribute('src', M.util.image_url(collapsedimage, 'moodle'));
+            this.get(UEP.BASE).one('.'+CSS.SEARCHOPTIONS+' .'+CSS.COLLAPSIBLEHEADING).once('click', function() {
+                // We want to do this just once, the first time the controls are shown.
+                this.populateStartDates();
+                this.populateDuration();
+            }, this);
             this.get(UEP.BASE).one('.'+CSS.SEARCHOPTIONS+' .'+CSS.COLLAPSIBLEHEADING).on('click', function(){
                 this.get(UEP.BASE).one('.'+CSS.SEARCHOPTIONS+' .'+CSS.COLLAPSIBLEHEADING).toggleClass(CSS.ACTIVE);
                 this.get(UEP.BASE).one('.'+CSS.SEARCHOPTIONS+' .'+CSS.COLLAPSIBLEAREA).toggleClass(CSS.HIDDEN);
@@ -163,10 +168,7 @@ YUI.add('moodle-enrol_manual-quickenrolment', function(Y) {
                     this.get(UEP.BASE).one('.'+CSS.SEARCHOPTIONS+' .'+CSS.COLLAPSIBLEHEADING).one('img').setAttribute('src', M.util.image_url('t/expanded', 'moodle'));
                 }
             }, this);
-
             this.populateAssignableRoles();
-            this.populateStartDates();
-            this.populateDuration();
         },
         populateAssignableRoles : function() {
             this.on('assignablerolesloaded', function(){