I'm not so sure about that. It's not like they just picked one or picked two in the same battle... a lot of people voted correctly but just didn't vote in one or two of the battles... Maybe they didn't want to vote in a battle where they didn't really have an opinion?
Also, many people including myself seem to have made the decision not to vote in their own battle rather than vote for their opponent. Makes sense to me.
@Cowboy: I don't like their pictures.