It's simple, put yourselves in the traitors' shoes. Your comrade is starting to attract votes. What do you do? Try and stave off the building bandwagon by joining another? Or do think, it's too late, and jump aboard to separate yourself early and deflect suspicion elsewhere?
No votes are useless. Especially not ones that off a traitor.
That's why I can't see much in them. They could be either way. Or even split. The baddies may not have even known he was a traitor depending on which traitor he was.