I do not think Sandra disliked the other girls. I think she needed a high amount of interaction (strokes). And since she was not getting it, she was fighting. If I was her mom, I would tell her people avoid drama. By starting fights, she is getting exactly what she does not want.
I am not crazy about judges picking off girls in other teams for the purpose of bettering their own team. If I was team mom, I guess that is what I would do. I would want to protect my girls....They need to do it some other way.