Matching this Series doesnt work at all. Example: Man City is matched to Arizona Cardinals. Matching “All Or Nothing” with TVDB only shows offers the NFL Seasons altough all are on TVDB. Here’s the link to the different All Or Nothing Series that get confused by plex: https://www.thetvdb.com/search?query=ALL+OR+NOTHING
It is impossible to have both series (Football and Soccer) parallel in your libary without one getting mismatched.
Would you mind sharing how you named those shows / structured their folders?
Based on the official naming schema, the following should work:
TV Shows <- the folder linked to your Plex tv-shows library
All or Nothing Manchester City
Season 01
All or Nothing Manchester City - s01e01 - Great Expectations.ext
All or Nothing Manchester City - s01e02.ext <- episode title is not needed in the episode file name
...
All or Nothing
Season 01 <- "A Season with the Arizona Cardinals"
All or Nothing - s01e01 - The Cardinal Rules.ext
All or Nothing - s01e02.ext <- again... episode title is not required
...
Season 02 <- "A Season with the Los Angeles Rams"
All or Nothing - s02e01.ext
...
where .ext is your respective file extension.
If Plex accidentally mismatches them you should still be able to split them (on the show level) and manually fix the match.