It seems beyond doubt that there are some slow leaks. I just don't know the significance. Currently it takes about 6 hours for the pressure in the system to drop enough that the pressure goes below 5"water and the indicator switches to red. That seems like a small amount but I don't know. I have already passed the 10 day period and will wait about a month before weighing the tank. I only have a bathroom scale and need to see a drop of a pound or more. If a lose a pound every month or so, I will probably live with it. I have not seen any bubbles with leak tests and odor is absent or minimal.
I have not used my RV in over a year and barely used it since Covid started. After my month long test I plan to cycle the furnace, stove, HW heater and check afterwards using the switch over indicator.