Well, I am happy to report that you are correct. I guess running the fridge/freezer on 120 takes longer than LP. I replaced the burner tube and orifice. I ran it on LP for a few hours while I went shopping ( also got a wireless thermometer for it ) and the freezer was at 29F and the fridge was at 40F with an ambient temp of 59F. It was only running for about 3 hours and im sure it would have chilled more as time went on.
My temps are approx, it seems as though the wireless thermometer is about 15F higher than reality
Thank you for all your help.