You said the experts say" the girls can't throw the pitchs". Would you consider Ernie Parker or Don Sarno experts? I believe they suggest it is up to the individual if someone is ready for the breaking pitchs.
I've not heard of Don Sarno, but from memory Ernie Parker said that the 'breaking pitches' at that age are often just a high fastball or a straight plane. I also have Cheri Kampf's book, so I very easily could have mixed those two up.
Either way, I don't understand how the young girl in question could be throwing those pitches. I'm 26 years old. I've been pitching for eight years. I started to teach myself the change up and drop ball and its not an easy task. I've also tried the rise ball and I struggle with getting my hand around the ball properly. How a 11 year old would be able to I don't understand.
Honestly the more I watch the angrier I get on batsleft's behalf. If she's been pitching for two years, these very big problems should not be existing in her motion. ESPECIALLY when she's supposedly being taught the breaking pitches. The PC is a con artist.