So I've noticed this season that the play calling is not matching my gameplan settings. For an easy example, Nickel Normal SS Blitz was called 22 times last game. In my gameplanning defensive settings, this is my 6th weighted play from the nickel formation. This was called almost entirely against the 113 formation, for which I had no active defensive rules. The only rule I even have for the 113 has the SS Blitz as its 11th weighted play.
If I were to hazard a guess, it's possible that the game is still calling based off of old (long since deleted) rules. Otherwise I have no clue, because it really makes no sense. There's also no way this is simple RNG, as this has been happening all season long.