Alright, I think it gets tired when it gets time to vote for a map. When that happens all of them are listed. Usually the same maps are chosen again and again. That doesn't give chance for the other ones.
What I'm suggesting is to add a new way of map voting:
When it gets time to vote, 6 maps that haven't been played for the last hours has to be listed. I've seen that in other servers and I find it really good. It's some kind of plugin.