I don't fully understand your scenario, so won't attempt to diagnose
what happened.  However, if the Move Data was successful as you say,
there should be a very small number of files (perhaps just one) on this
volume.  You can confirm this with the Query Content command (you might
want to use the Count parameter to limit the output, just in case).
You should then be able to delete these files from the database using the
Delete Volume command with the Discarddata option.

Dave Cannon
ADSM Development