As one of the writers said. You only have 10 votes. And if you have 11-12 you think should be in the hall, are you going to vote for the guy that is surely to get in, or the guy that if you don't vote for, might get eliminated?
Of course I don't know if that's how the 3 voted. But sometimes it's not as easy as you didn't vote for him, you are stoopid.