That didn’t have an effect because Plex already associated the files and identified them as those already existing/matched items from before.
If you want to force the shows being properly recognized/matched you’ll need to drop them from Plex first (=Plex Dance):
- move the 2 folders outside of the folder linked to your Plex anime library
- in Plex:
Scan library files
for that library and wait for it to complete - in Plex:
Empty Trash
andClean Bundles
- return the folders so they’re directly placed in the library folder (
/volume1/Media/Shows (Anime)/
) - in Plex:
Scan library files