What determines if you have earned a kill? Do you just have to land the finishing blow, or do you have to be the only one engaged in combat with the person for it to count? The reason I ask is because I have managed to score quite a few kills, but my Kill counter still only says 1. In some cases I was the only person who attacked the one who died but they attacked someone else, and in others everyone was beating on everyone else. Anyone else noticed this?