Are you saying you changed the path to the TV folder?
If you’ve made the appropriate changes sometimes you have to Plex dance ← click
If you don’t, those combined and merged episodes don’t want to unbind sometimes. It may look they’re not showing up but they could still be merged with some other show. I don’t know if you already checked that so I’m guessing a little bit
If that still doesn’t work I can take a look at a screen shot of your file system so I can see the exact file structure and naming
