The umpires are waiting until they get to the next level before they start to call it. No need to retard their progress.
Not sure about this another pitcher different teams, was placing the ball in her glove pulling it out, and putting it back in to start her motion some of the fans were complaining about that also, not sure myself it would be considered illegal or not.
it's really surprising to see these college-level pitchers still leap and keep both feet off the ground or replant and not get called.
waiting for a higher level? if it's a rule, it should be called even as low as 12u. when are they going to learn?
I saw it called several times over the past weekend. It has to be an isolated bad ump situation.