I cant interact with the weapon plaques and when i put armor on the mannequins in the basemant the mannequinns turn invisible, this happenin to anyone else

That's the Riften one, right?

Mannequins work fine for me. Except for the bug where one will always spawn a Daedric Helmet. But that's in my favor.

I think I win the bug contest.......
http://steamcommunity.com/profiles/76561198029014581/screenshot/595829056231058896?tab=public

One of my Mannequinns is halfway in the ceiling, the other one seems fine most of the time...

It seems that they are pretty buggy.

Yeah in Riften it im on PS3 but i cant get it to work at all or weapon racks only bookshelfs

Weapons Plaques? Or Weapon Racks? You can interact with the Racks, but if there is a weapon already on the wall, that is not a Rack. The racks you can put weapons in should be empty when you buy the house. Also, you have to have the weapon you want to put on the rack equipped or it will not go to the rack when you activate it.

As for the Mannequins, they do go invisible when you first put stuff on them, but they reappear after a moment.

Definatley

the red ovals on the wall they do come with iron weapons on them but what about the ones near the mannewuins the are empty