Microvision Track/Record and current cue number

I've just finished teching a show on a somewhat cranky Microvision, and discovered (the hard way) that when re-recording a cue, the default cue number is often the next cue, not the cue on the faders.  It's as if one had keyed [Record] [+] instead of just [Record].  This happens occasionally with Record and almost always with Track.  It seems to only happen in Stage.

Does anyone know if this is a bug, a quirk of the software, or a possible short between the Track and + buttons?