You should be fine with 2 GC to watch TV and run LP fridge.
Roughly: TV=4 AH, LP circuit in propane mode, 8 hours = 8 AH, lights (not LED), 2 pairs of domes for 3 hours = 20 AH. Fan 12 hours = 12 AH. Total = 44 AH. Make it 50 AH for whatever small items you forgot to mention - pumps, LP detector etc.
Questions to be answered:
1) How full were the batteries by sunset, or, at least, what was the voltage (preferably measured on battery terminals)?
2) Did they went into Absorb and then to Float in due time (whatever the Abs time is for this controller)?
3) What was the Absorb voltage?
4) Did you turn inverter Off before going to bed? (mandatory thing to do for energy minimalist).
5) Did you use furnace?
6) Obvious question, but still - did you try running 120V devices other than TV?
