Multiple hitTest problem

Hallo all, this is the problem I am facing.

I have ten rectangle movie clips on my stage. Each movie clip can be dragged.
If i start to drag one movie clip and release it on top of another (this is done using the hitTest function) a specific function will be called. The problem is that the movie clips are close to each other so on release the hitTest function returns true for more than one movie clips.
Is there a way to avoid that?
Thanks a lot in advance.