The floor probes are only measuring the air up entrance but I suspect It can be hotter near the firebox. This was just after smoking cigarettes a eight lb butt in just 8 hrs at 220 intended temp. I go the butt near the entrance my next cook and it https://edwinjxisa.blogitright.com/14250053/old-country-bbq-pits-over-and-under-smoker-an-overview