I just have a few thoughts on your setup. You should replace the dial thermostat with a digital one. They are much more accurate. Ball pythons are also terrestrial and I'm surprised your girl climbs up to the top. Mine are horrible climbers and would have kept falling down. Do you know what the temps are at all of the different levels?
As for shedding, bad sheds are a sign of the humidity being too low. This may be a result of how you have your cage setup up. You can try misting her when she sheds.