I don't know if the differences are in result of INPA version (I'm using 1.40). Or in result of the versions of the airbag module, as you can see in the pictures I posted, my airbag module is the MRS3 (an older module), and in your pictures where the INPA shows consistent result the module is a MRS4. I made a Google search and the menus similar to yours are all MRS4.
So I don't know if it is a IMPA version problem or a airbag module version problem.... Anyway I didn't discover yet if in my menu, it means the seat is occupied or not. If exists any "child seat" feature in the e46. And more important if the passenger airbag will deploy in a accident.
Hope I can solve this...