Reverse Posted Mass Addition

Hi All-

One of our users queried all of the mass additions in the ON HOLD queue and when reviewing the results, she selected "Post All," which she should not have done. The damage is that a number of additions are now posted, when they should remain ON HOLD.

I believe that I was able to identify all of the mass additions affected, but now we're stuck with a list of additions that should not have been posted. Is there a way to reverse the damage? I can't find anything in the documentation to address this situation, but I have to believe others have shared this problem. Basically we have a small number of additions that are now in POSTED that we'd like to place back on hold.