There is a problem: there is a 3 point. When you remove have one free-standing icon and the cluster labeled 2. When you click on the separate icon it becomes active, all other points are not put active icons. As when you remove a I know that the active period is included in the identified cluster. Want to change the icon, to active.
Decision the code does not need to understand the main logic, in the DOM of icons there, then they are loaded (i.e. when you remove the DOM of the cluster no of icons)