This is bad advice. The dashes are part of the Plex standard for show naming as are the two digit season numbers.
I think the problem is related to some embedded metadata in the mp4 files.
In the settings of the server go to settings/agents and in the shows section move “local media assets” below everything else for TheTVBD and for TheMovieDB.
After that:
“Plex Dance” to force Plex to reread the show correctly.
…
Move the folder to a location where Plex cannot see it
Force a scan of the library
Empty trash
Clean bundles
Move the folder back into the library
Force a scan of the library
…
Be sure to do each step above in order and allow each step to complete before doing the next and do not skip any steps.
Also before you do the above be sure the agent “Shows” has “Local media assets” moved below everything else.
