I kind of think they tweaked a few variables to get the poll where they think the actual vote will end up. And a little closer to where the other polls are. That keeps them from having their neck stuck out so far. They’ll get a lot of visibility once the election is over.
Seriously, the ABC/NBC/CBS/Fox polls are all Clinton +4 right now. Has that happened at any other point throughout the entire race, where they all showed the exact same result? No. They are manipulating their final polls to match one another, so they look less bad if they're wrong.