How can I edit a match (remove shooters, adjust scores, etc.) after a match’s results have been posted?
Just change what you need on the master scoring tablet then repost the results.
I understand removing shooter who were not present. But what, at this point, would call for scoring changes?
Maybe you catch the fact that you edited someone in PCC, Production or Carry Optics using an Apple tablet and it set their Power Factor to MAJOR. You then need to correct that to minor.
The iOS version still forces these divisions to MAJOR in USPSA.