Looking for fix for bizarre Mannequin armor dupe

[KingMeowsers]

When I first crafted the mannequins in the armory wing of my house, I placed dwarven armor on them. Later on when I was looking to sell off all my useless armor and weapons, I took the dwarven armor off and went and sold it. When I came back my dwarven helm, gauntlets, shield, and boots had duped back onto the mannequin. I went about fixing this dupe glitch the way most do, and it worked.... temporarily. When I came back one time from an Adventure, I had noticed the Thieves Guild armor I used to fix/prevent the dupe from happening had removed certain pieces of the set from displaying. I opened the mannequin up and removed all the armor, soon forgetting it had happened. Down the road I went to place a new set of armor on the mannequin, and decided to test if the Dwarven armor would work properly, only to find out I couldnt place the Helm or Shield on the mannequin. Somehow this triggered a new glitch whereas every time I exited and reloaded the interior of the house, I would recieve a dwarven helm and shield. Sadly I cannot find a way to prevent this from happening, seen as the only fix I could find was prevented by being unable to place the helm or shield on the mannequin. Currently there is no armor in the Mannequins' inventory, yet I still recieve 1 of each piece upon reentering my house, which is very often. My inventory gets weighted down quite often because of this.