Changing the way that map votes are dealt with is a bit complicated. An easy fix would be to move maps from slots 1-5 to 2-6, then if someone press #1, it will cancel their vote. Is this good enough or should we wait until a better idea is worked out?
Ideally I'd like the #1 vote to choose a random map from slots 2-6, but that will take more time (if possible). Then I'd like to randomize the nominations in slots 2-6 so that people don't race to nominate first.
If people like the way that map votes/nominations work as it is now, then they should also mention that here.