Those files may have previously been linked to incorrect shows.
Several options -
-
Plex Dance
It’s important to complete those steps in order.
This will probably be necessary to correct any bad File → Show association. -
Check for anything that hasn’t been matched. In the Library view,
Unmatched. I don’t think you’ll have anything. -
Check for Duplicate Episodes. In the Library view,
Duplicates→Episodes→Date Added. This would reveal any bad File → Show associations that have happened. -
View by Folders. In the Library view, choose
Foldersand navigate to the files. Clicking an episode should reveal what show that file was associated with.