Has anyone had this problem?, Bug?

I do alot of editing(cut/paste, Step) of my
MIDI drum sequences. This includes copying
tracks from one sequence & pasting to tracks
on another.

When i've done this to a drum sequence & i then save it to ZIP disk or 3.5", the saved
sequence seems to get f*cked up(ie: portions
of the edited track or other tracks are lost
or modified). To get around this i've had to
re-save,re-paste several times & in several
combinations.


Does anyone have any ideas?

Thanks

robert