I used the same "World Name" on my games all the time and was beginning to think the map generatored used the name as a seed. Then I heard in IRC they are using the same map.
I just found out about the game a couple weeks ago and got into the beta this weekend so I haven't had time to catch up on everything. I'm trying to read as much as I can to come up to speed on everything. So I'm bound to not know a few things. Just so you know your not alone. 
