Yes, As I first posted, removing the - is the answer here.
@ChuckPA said:
Look at yourSxx-Exx. This is incorrect.SxxExx(no punctuation or spaces)
It may be necessary to move Season 5 to some place PMS doesn’t monitor, Scan the library, Empty the Trash, Clean bundles, and then move back (the Plex Dance) to get it recognized properly again.