multiple parsys in custom column component has few more unwanted editable divs as iframes as par1/*

Hello Members, 

we are trying to create a custom column control component with two parsys side by side. While the component is being used by authors , they see an additional editable div which is highlighted on mouse hover event. this confuses the authors more about where to drop component and while deleting as well.. Any idea why AEM introduces this additional iframe div ? it is seen that its set as draggable = true in debug console. Any way to get rid of this additional div in authoring mode?