Show being treated as a folder instead of a show

[duranbong]

I recently installed Jellyfin and got it to scan my media library. It worked great for some things, and failed to recognise others. That was fine, my naming had been all over the place, so I started renaming stuff according to the guide, regularly getting Jellyfin to rescan along the way to make sure it was working.

For some media this was fine, but for a few no matter how I rename things it won't detect that a folder is actually a TV show. For instance, with my Cowboy Bebop folder I have tried:

• Renaming the folder to include the year (trying both "Cowboy Bebop (199" and "Cowboy Bebop (1998-1999)")
  
• Renaming the files to match the scheme in the guide (they are now all "Cowboy Bebop S01EXX - <Episode name>.mkv" - I also tried without S01 since it's a one season show)
  
• Manually identifying each individual episode using its IMDB id
  

Each time refreshing the metadata of the whole library (using the "new and updated files" option).

But despite all this, there's a folder icon instead of an unwatched episode count in the corner of the folder in my media library and the show doesn't shop up in the "Next Up" section. Most annoyingly, unlike my shows that it has correctly identified, there isn't an "identify" option in the context menu! It looks like when Jellyfin has decided something is a "folder" rather than a "show" there's no way to tell it otherwise.

Is there something I've missed? I can't find anything that I'm doing that is different to the guidance.