The umpire made a mistake in this instance. B1 is not an illegal subs she was an unreported sub. In the case of an unreported sub, the coach and player are given a warning. If another unreported sub takes place during the game, thats where ASA & Fed rules differ. Either the player or the coach is restricted to the dugout (just as good as tossed lol). An illegal sub is a sub who had no proper reentry into that position in the lineup. But in this case she had legal entry into that position she was just reported.