How old is your snake and how long have you had him? If your snake is eating and otherwise seems healthy then what’s the worry? They’re cold blooded animals so they will be cold to our touch. As long as they have a proper thermal gradient they will move between climate zones as they see fit. I have several snakes that only use their warm sides when they’re digesting a meal. I do agree that your hot side is a little high and your cool side is a little low but neither are life threatening. Snakes are often exposed to higher and lower temps but an 88/75 gradient would be better.