I think it all depends on when they were taught how to slap. My dd only learned last year when the rule was already in effect so her coach made sure she didn’t come close to stepping out of the box. I’m assuming that once you’ve been taught a certain way it’s difficult to make an adjustment without a lot of repetition.
and, they should have known to adjust since it was being complained about to the refs BEFORE the call that cost them a second out at a crucial time.Florida state got called last night.