I have the same issue in Warehouse 1, except that it seems to also place trapdoor items in the corner of the room:
I had placed 17 Bird Cages and 17 marks that described what was in them (that was the only furniture in the entire rental). While that may up to a decent amount of characters in placeable names and descriptions, it still seems like an interior of this size, rental or not, should allow for a way higher limit. What I placed barely made 4 of the available 12 map tiles look lived in.
I personally do not know how big the placeable limit is, but I suspect that what is happening here and in Shop 3 is more of a bug than just how it is supposed to work. If it is not a bug and the rental spaces can really just handle this amount of placeables, I'd suggest making them half as large.
Edit: It also looks like the mark that didn't get deleted, to the right of the picture by the door, got it's coordinates moved.