Just one episode prior, Lucy got in major trouble and was told she couldn't do anything for 3 months. There shouldn't have been any consideration of her going out.
Simon says he lived in his old room for 10 years, but when the series started he shared a room with Matt (in Matt's room) and Ruthie had her own room. It wasn't until later he moved into the other room, he and Ruthie got bunk beds and shared a room. Not right..