Exception.create (dedupe exception create) should purge rows from the prev next table relating to the match
I'm pretty sure the current code fails to exclude dupes that have been flipped the opposite way from their exclusion (based on reading the code). I proposed we add a BAO_Exception object & the create action removes merge entries from prev-next cache (by calling a function on a Dedupe class, not by a direct query as I think it may not always be stored in that table)
@seamuslee FYI