Im sure your tired of hearing all this but we cant tell you enough...

You really need to get sufficent hides for your snake. Shes not feeling secure at all. Both hides should be identical for her, she should not have to chose security over temperature.

Ditch the heat rock all together, they are known to fail very BAD! Your snake wont know it and it WILL get burned. Replace it with an under tank heater with a thermostat on it. Thats the best route to go. You dont need UVB at all, its pretty much a waste of money. The natural light that is in the room will do fine.

Were all not trying to jump down your throat and tell you how horrible your setup is, we simply want to help you to provide the best living environment for your animal.