This player recently changed their name. Upon downloading an SGF from some of their matches (like this), the old name still shows on the SGF file downloaded. Not sure if it is unique to this player or a system wide issue.
EDIT
Actually I found a match that show the updated name. Perhaps the matches that began with the old name still show the old name and the new matches that began after the name change, now reflect the name properly. That makes sense if that is indeed the case.