Can someone please explain this to me?

http://www.youtube.com/watch?v=EVEzhcmCRo4

I logged on this morning and my friend was telling me my name had appeared under Odin who had just spawned. Just... what?

I don't know if it's related, but I actually recorded me fighting against him a couple of days ago, did I get the killing blow and this is why it happened? And now someone's else name (unless I somehow got the kill again) is going to appear under him? That's the only thing I can think of.

http://www.youtube.com/watch?v=_hPGUixnq34