Ctrl-Z in Melodyne

Be careful people, Ctrl-Z works as intended for for both Sonar and Melodyne depending on which program has the focus.
I was editing the timing for a guitar piece in Melodyne (BTW Melodyne has no 1/8 timing marks in the grid if you're in 12/8 or 6/8 time) and was using Ctrl-Z to undo each movement attempt. I used the mouse to rewind the song in Sonar, hit Ctrl-Z, and BAM I 'undid' create RegionFX and lost all my edits. Not only was there no way to get the edits back but also Sonar is unstable (as in ruined project) after a Melodyne Undo so I had to quit without saving to reload and start over again.

This was my fault of course, but it was so easy to do.