As long as a structure is owned by civilan, it is occupiable. Occupying a structure changes its owner to the occupying house. Thus, buildings occupied by civilans are still occupiable. I don't consider this a bug. Civilian structures aren't supposed to be "occupied" by civilians.
As long as a structure is owned by civilan, it is occupiable. Occupying a structure changes its owner to the occupying house. Thus, buildings occupied by civilans are still occupiable. I don't consider this a bug. Civilian structures aren't supposed to be "occupied" by civilians.