Thank you!
New insight -- The sudarium was wrapped around Jesus' head on the cross and then removed, set aside and left in the tomb when he was wrapped with the shroud during burial. Prior to this I had understood the passage to mean that Jesus had two separate wrappings while in the tomb, and that didn't fit with the shroud at all.
Good one. I hadn't thought of that either.
Notice that upon entering the tomb the disciples immediately suspect a miracle. Why wouldn't they assume that the body was moved, unless there was some physical evidence indicating otherwise?
I also find it bemusing that the Shroud was left neatly folded in the tomb. I guess cleanliness really is next to godliness.