I live in the Vlindrel Hall in Markarth and I when I got the house upgrade that includes the mannequin I put Imperial Legion armor on it. Later I took the legion armor off and gave it ebony armor. Once I left my house and returned my mannequin was wearing legion armor. It cloned me a new set a legion armor. I didn't lose my ebony armor but now when ever I enter my house it clones me legion armor. It is getting annoying because I don't want this many sets of legion armor and my mannequin is never waering what I want it to.
Any way to fix this?

The markarth house is pretty screwed up. Besides countless other problems with it, I've had my mannequin teleport around the house. More often than not it appears in front of my bed after I sleep.

oh your mannequin is just reminiscing the days it was an imperial... before it took an arrow to the knee

Seriously though, did you try removing all armor and zoning?

I took all the armor off my manneiquin and re-entered my house and it still clones me legion armor.