When I match frame from the timeline, the source tracks available do not show up properly. Only the previously available source tracks show up (ie. if there were 1V and 2A previously even though my match framed clip has 1V and 5A). If I immediately edit into the timeline, then the available tracks show up. So what I end up doing is a match frame from timeline, edit into timeline, undo, and only then do I have the ability to select and choose destinations for the source material. Bug?