Balk question

[ToGreySt]

Here's the situation, FED rules. Fall Ball league for High Schoolers. R2. the pitcher takes the sign from the rubber in the windup (facing the plate). he (a). rises his hands over his head (just like the first part of his windup), once he reaches the highest point over his head he steps off the rubber. (b) starts his windup by stepping off with the wrong foot and rises his arms over his head.

both times he caught the runner, however I called a balk in situation B. saying that he didn't break his hands once he disengaged from the rubber.

it just seemed wrong that's why I called it, but the pitcher was livid, saying things like he does it in high school ball all the time. So I need some backup and a rules reference if you guys have one.

thanks,

Joe