As for now, 2x2 modules use only spriteShape sprite. Some kind of "lower level" for buildings. But in mods there can be high 2x2 modules, so facility builded higher than 2x2 (1 tile to the north) can "overdraw" part of 2x2 building. In vanilla it can not be, because all basebit sprites are "short", but in mods we can get ugly mix.
So, suggestion: use spriteFacility for 2x2 buildings if it is set.
Thanks.