Found issue with the groups, corrected the binding, was assigning the entire object (data) to the groups observableArray rather than the groups property (data.Groups)

#99

DataCenter_Windows/WindowsDataCenter/WindowsDataCenter/www/spa.js

@@ -470,7 +470,7 @@
                 "IsContractor": false
             });
             self.getGroups(function(data) {
-                self.chosenUserDetails().Groups = data;
+                self.chosenUserDetails().Groups = data.Groups;
                 self.chosenUserDetails.valueHasMutated();
             });
             self.getUnassignedCardData();