My guess is that you can tell if a song has been matched before? If a song has been matched before and I don’t want it processed again, can there be an option to move the song to the matched folder? This way it doesn’t split my matched files into two separate groups.
Match all songs if even if already matched - possible option?
If just don’t want to process a matched song again just disable Match all songs if already matched on the basic tab, this stops the matching process for these, these songs will go straight to the Save changes stage, and if you have Move to Matched Folder enabled it will indeed recognise that the songs are already matched and then move them to the move folder.
So I think you have what you need.