I am unsure of what is causing this issue of multiple rigs in your case, we have seen this before (but back in B3.)
At that point it was an issue with the flea market, perhaps you have a config set incorrectly in the sell to flea market mod?
Alternatively you can try unlisting any items you have up for sale, maybe something bugged out there?
Ok i will try that
Edit : I looked at the flea marked mod config and there are some stuff blacklisted there, i am not sure if im suppost to remove them.