What I've seen with newer coaches / lower-end teams the coach just has too much going on and isn't paying attention. Forgets to call a pitch number, looks around, looks down to his chart, looks around again, calls pitch, pitcher wants it called again. 30 seconds later the pitch finally comes. My daughter is 1st year 14, she's just starting with the wrist bands. Her coach is on it, she definitely misread the arm band this weekend, though. I'm glad she's going to do both. I have talked to college girls who never did wrist bands until college.