I can see how the author thing would be confusing. I think as long as you're being consistent, either way is fine. Lore had a good point about it being like the Oscars, where the same actor could win Best Actor more than once for different roles, but I've always viewed it more like Miss America - once you win that title, you've got bragging rights to it forever, but the following year, it's time to pass the crown to someone else. That way, more people get to win, and no one can dominate the same category year after year.