Hey, my little Yoshi has been acting exactly the same. I have his CHE on a thermostat so usually just go by that for temps but last night I temp checked the whole enclosure with temp gun and it was giving out really weird readings completely mixed even right under the CHE it was varying so much. Not really sure if its theCHE bulb needing replaced but its under a year old. Might be the same for you? It would be worth checking.