bug in swapdepth ?

hi hi~ i having this little problem with my drop and drag. i used droptarget and swapdepth to pinpoint the spot to drop and to prevent overlapping.
i have 3 target areas and 6 objects to choose and drop on the targets. so after that i on (release),i check the position of the objects and it will point me to some other frame. everythin regarding the swapdepth and droptarget is working fine.

but the problem is after i go on the other frame, the last object which i drop will be still on the stage, even if there is no layer for that object. i remember reading about this problem somewhere when i was reading about swapdepth but now i can't seems to find it....

so anyone... if u understand what im talkin... please help me...

Thanks in advance
anyway i uses swapdepth in this manner

this.swapDepths(_root.getNextHighestDepth());

http://www.kirupa.com/developer/actions ... pdepth.htm