My DD still struggles with bent legs on a few skills. She's a smart kid, and a very hard worker, but she says sometimes she can't tell they are bent. She's at a new gym now where they are giving her more advice on how rather than simply saying "straighten your legs," and she's improving on it a lot. I agree with the others that it doesn't have to end a gym career. Mine won beam pretty much all season as a level 7 with slightly bent back knee in her BHS-BHS series, but really got nailed on it last season as a level 8. A lot of kids need time and maturity to put all the pieces together.