So, I've just recently finished my new house, full of weapon racks and display cases for all my neat loot. But all of the display cases appear to be just that - plain 'ol display cases and not weapon display cases like found in the older purchasable homes. Meaning you have to manually place items in them.
So what's the problem with that? Well, the problem with items jumping around appears to still persist in my game. IE, I drop an item, place it where I want it, leave, come back, and it's up and flown across the room to a random location.