Hi guys,
I can confirm that that this functionality got lost in the transition from "layers" to "lanes." I'll even suggest that the behavior you're seeing is not our "intent" ;).
I'd like to request that anyone who is impacted by this submit a report here:
http://www.cakewalk.com/support/contact/problemreport.aspx This will raise the priority of the case so that it gets addressed when we update. We have a patch planned that will introduce official Windows 8 support. We'll be able to include fixes for a few issues like this in that release.
For now, I think we'll need to slip edit the two adjacent clips individually. Clip Landmarks can be enabled to help keep them exactly back-to-back.
Thanks.