If you're not a public member, you won't appear - otherwise, you should be able to follow the link "your entry" in the directory menu to be able to see your entry.
They probably haven't set themselves up as a public member.
Let us know - there might be some simple confusion like years or conventions being confused as there have been more than a few instances of different games being called the same things.
No, probably not - we'd like to encourage people to put in the games that they have written and run previously. Why? Because often people remember your game, but forget your name, and then at the next Con, they go looking for you - much easier if they can start with the game.