Our 08 Knight is wired the same. 2 15 amp circuits off the inverter run most but not all the a/c outlets.
Once I turned pulled both breakers and checked for power at every outlet. Discovered that the outlets on the "bed side" of the bedroom are on the main a/c, the "TV Side" is on the inverter. Kinda wish the bed side was on the inverter, but haven't figured out how to do it.
I have yet to map which what is on which inverter breaker. I need to do that someday. Always "assumed" the microwave is alone on one of them, but not sure.