Toolkit version 2009.2

I have a "XamWebDateTimeRangeSlider" and I have 2 thumbs.  Both thumbs interaction mode is set to "Push".  When both thumbs are not at ether end of the slider, they interact correctly.  It's when one thumb pushes the other to the ends is where they start to function oddly.  When the left pushs the right to the far right, you can grab the right and move it to the left but leave the left thumb still at the right.  The right thumb is suppose to push the left thumb back to the left.

I've included a simple repro of this issue.  To reproduce this drag the left thumb to the right pushing the right thumb to the right too.  Once both thumbs are all the way to the right grab the right thumb and slide it to the left, the left thumb will not get push but the right thumb will be able to move to the left.