Help: PPM Training and Team Talk Questions

First of, I accidentally have one of my players learning the wrong move -- at least, not the one I wanted him to learn; and so, I was wondering if there is a way to actually stop the training.

Second, I was wondering what actually determines the tone coaches use in team talks. I have three coaches with the same Motivation attributes, but one uses an assertive tone, another passionate, and the other calm. And what tone would be better to use, or does this depend on certain circumstances?

Thanks!