Sorry but I keep getting hung up about these statements. Are you referring to thermostats in your house or a thermostat for your mode of heating your enclosure (which is a must). The ten degree fluctuations are pretty alarming to me. A thermostat for your enclosure should reduce the fluctuations so you can have a steady temperature for your ball python.
It´s mentioned that there are two heat mats (one on each side) both regulated by seperate thermostats.