If you had voted for the multiplayer maps, Spherallic, Crystalline Caves Zone would have gotten a 7.75 and Abandoned Disco Zone would have gotten a 6.5. That's still not quite a win, but of course, with so few votes, outliers are more likely to make a difference, and that's the case in this contest. If more people had voted I suspect the results would be very different.
I'd like to take this opportunity to point out to everyone that didn't vote that if your personal favorite didn't come out on top, it's entirely your fault. I'm extremely surprised at the lack of dropped votes, as they really CAN help you. Spherallic's not voting dropped him from 0.11 behind, where pretty much anything could have pushed him over to win, to 0.64 behind, a clear second place. Even if you don't think you're in the running to win, voting will improve the results of the contest and also is a great way to improve your own mapping skills, as playing other people's maps and attempting to determine what makes the map work or not work can be dramatically helpful in avoiding the same pitfalls in your own work.
On the other hand, I am really happy with the quality we had here, especially in the match contest. 4 maps above 7 is great, especially compared to last contest.