If it shows in a movie library but not in a tv library, you probably have a naming issue.
Both names seem very wrong and Plex is pretty strict when it comes to file names for tv shows. The reason one of the files is properly recognized might be because of some embedded metadata Plex can interpret.
Naming follow the naming conventions.
Example:
TV Shows← the folder you have added to that library
.. > Show Name← the name of the show as listed in TheTVDb.com
.. .. > Season 01← use the English term!
.. .. .. > Show Name - s01e01 - optional episode name.ext← whereextis the file extension
.. .. .. > Show Name - s01e02.ext
.. .. .. > Show Name - s01e03.ext
.. .. .. > ...
Fix your file naming and folder structures.
After that you might need to perform a “plex dance” to ensure Plex doesn’t confuse the files with previously wrong additions:
- move the files /folders of that show outside the library folder
- re-scan the library and wait for it to complete
- empty the trash within Plex (context menu of that library)
- move the files/folders back in place
- re-scan the library
