BillyBuckaroo

I wasn't really sure where to ask this. I've looked around the web a few times and haven't really found anyone else having a similar issue, so I thought I'd turn here for help. I recently started renting a homestead with a friend of mine, and we're letting a few friends stay on the land with us. They've rezzed a few things in the appartments we gave them, but the problem we seem to be having is the Objects tab in the About Land properties don't seem to be detecting their prims properly. I've hand counted everything one of my friends had in their room and it only came to 50, whereas the Objects tab tells me that have 200+. I asked the friend to pick up all their things, and I'd auto return everything that wasn't in his room, but after doing so nothing appeared in his lost and found? But the prim count did go back down. He re-rezzed everything in his room and I thought the problem was over. An hour or so passes, I've been with him the whole time, we've just been sitting and hanging out, I check the land tab again and he's back at 200+! This isn't the only user it's happening too, and I know and trust these people, I know they're not just rezzing random crap for the heck of it to screw with me. It also seems to occasionally happen to myself and my co-owner, and it's driving us up the wall! If anyone has any ideas what could be causing this, it'd be much appreciated.