If you look to the right of this post you will seea small "badge" of George's Fun Bus 2. This represents The Leaderboard. The Travel Bug at the top will be leading, the one at the bottom will be "on the bubble" and facing elimination. Once a TB has been eliminated from the race, it will appear on an Eliminated board. The TB owner may then edit it's page to create a new mission for it as it is no longer a part of The Great Travel Bug Knock-Out.
As you can see, as the distance travelled by each TB is shown, it makes it much simpler if an entrant could enter a Travel Bug with zero starting milage.
Happy caching, STP