IME with 10U travel so far, they hardly ever call illegal pitches anyway. I've lost count of how many girls we've played against that pitched illegally. Every coach we've played with just lets it go. On our team in the spring we had a team complain about one of our pitchers. She was like our #5 and we put her in because we were way, way up, then they complained. Even though the coach complained and he was right (she did pitch illegally) they still didn't do anything about it. Just FYI, not that I'd count on that because you never know. It does sound illegal.
My DD got called for stepping back in a USSSA 10u tourney.