I agree it wasn’t the right thermometer but it measured something at those temps. It was either the vent or the duct behind the vent.
Furnace problem was simple. I turned the front furnace on and the rear one came on. The rear one turns the front one on. However they both still rely on their own respective temperature sensors. So they run on and on because the sensor in the front won’t turn the rear one off.
The front touch control turns on the front a/c and the front heat pump but the rear furnace. The rear touch control turns on the rear a/c and the front furnace.