@OttoKerner said:
Perhaps you renamed the files to a conforming name schema only after they were already (incorrectly) matched.If this is the case, you still need to perform the ‘Plex Dance™’ to erase their checksums from the plex database.
move all files for the show out of ‘sight’ of plex
update library (‘not force update’ not ‘Refresh all’)
empty trash
clean bundles
double check naming schema and move files back
update library
in this order
Thanks a lot ! It works for me, I’ll remember this tip.