I know this isn't the end all answer, but I think it would help if you post some pictures of your setup for her, and if you have a heat gun to measure exact temps? I remember your last thread being about a severe burn, and I hope the other one's recovering well!
Ball pythons, especially young ones, need hides and a lot of "cover" to make them feel completely hidden and secure (varies upon individual snake), otherwise it leads to stress and defensive behavior. It may be that the setup is not quite right for this baby, and that she was shy and defensive to begin with, making it worse.