I see YOUR point, but you completely missed mine.

One hide should be 80-82* and the other should be 90-92*. You shouldn't have two that are in the 90's.

Do me a favor and move all the substrate except for 1/4" off the UTH and place your probe right on the glass over the UTH. Not in the middle of the substrate, right on the glass.

Your snake will eventually figure out that it can move the substrate around to get warmer and it will do this. You need to measure the hottest point in the enclosure that the snake can possibly get to.

I have seen people make these mistakes before and end up with belly burns. I understand living in a cold house, I am in Chicago and I grew up in Michigan. I know how cold it can get inside. That being said, you do not need a crap load of lamps. One correct wattage light on the cool side of the tank should be enough to keep the ambient temp of the tank above 75*F.