Yeah I have the same issue.. The Hitzer is making it feel like its mid August.
I found my front air damper was not tight when the front knob was tightened down all the way. I took out the metal slider from the front ash door and bent the flaps forward just a bit so when put back into place the far ends were touching the inner part of the ash pan door with the middle section bowed outward toward inner part of stove (just a bit). Then when I tightened the middle knob down, it would pull forward the damper, making a tighter fit.
I hope this helps. My back air damper has been closed for over 24hrs and the stove was very hot. So far things are starting to slow down. Still in the 80's in the house, but I can tell the red coals are slowly going down. Hopefully the air damper on the back will soon open up...
But yes, take a match lighter stick or candle and go around your doors, closed dampers, and see if air is pulling flame into your stove.