Description of problem:
If you have group of elements out of swimlanes and you will try to move all of them in such a way as some of elements will be on one swimlane and rest of them on another all elements will be associate with one of them. (see attachment)

Version-Release number of selected component (if applicable):
6.2.CR1

How reproducible:
always

Steps to Reproduce:
1. Create Business Process with two swimlanes and some elements out of them
2. Select all elements and move it in such a way as some of elements will be on first swimlane and rest of them on second one.

Actual results:
All elements will associate with one of swimlane

Expected results:
Elements on first swimlane will be associated with first swimlane, elements on second swimlane will be associated with second one.

Additional info:
All elements out of both swimlanes also will associate like there are on the swimlane.

I guess it is related with bug 1262030