Ran into the same problem. Didn't even notice the last couple seasons because I wasn't making the playoffs. Even weirder is that not all teams have the same # of games at season end. i uploaded the save to ftp "wrong_number_of_games.zip". it was historically accurate up until current of course so seems like it'd be something to do with generation after those schedules run out.
btw this is for 2025, i got to this thread thru google so didn't notice. same issue though.