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No, that's by design (unfortunately?). Decorators can only move items in the house, but cannot place new items or take items from the home. Thus, they would need to mail or trade you the items, drop them someplace in your house, and then they could come over and do whatever with them.
Personally, I would have liked to have people add and remove things from the house, as long as they had the permission to. I'm not sure why that's a big deal if I approve it.