The Elliot's Couch????
How many times has that couch been moved from the middle of the living room to the side from show to show? Sometimes, the couch is in the living room facing out, and then it's back facing the dining room. In Come Home Higgins, it was moved twice. First it was in the center of the living room, and then it was moved next to the front door.
And what ever happened to the larger couch that Betty Jo bought? At the end of the episode with the couch going back on the train? Steve and Betty Jo decided to keep both the piano and the couch. Did they not be able to get the couch through the doors?