Exactly the same thing happened to me. The stuck one was there for quite a while before his clone turned up, though. I’d got used to him by that time and didn’t take much notice as I walked past, so I ended up doing a kind of double-take: “Yes, Louis, nice to see you again. Get someone to dig you out of that h… wait, what? You’re twins now?”

Stupid Bethesda. Still, unbelieveably good game. I can’t fathom how some people claim to have “done everything” in 50-60 hours. I played, over two characters, for closer to 200 and was still finding the odd new thing towards the end. Come to think of it, there are still a couple of Achievements I never got round to…