Well Atlanta will still be at home, the 49ers will be traveling almost as far as Seattle did (not sure if they have the late or early game), albeit not 2 weeks in a row. Seattle just destroyed SF less than a month ago...what you mentioned doesn't make up a huge 8.5 point gap between last weeks line and this weeks in my mind. I think it has more to do with SF a) being a more national team with more bettors, and b) beating GB, another national team, soundly the previous week. Still seems like an high line though overall. First, it's a 5.5 or 6.5 point difference. Second, for some reason I was thinking the game was in SF. And yeah, the last thing you did definitely plays into these lines big time. With the Atlanta collapse and near loss combined with SF's domination of GB, there's a little more reason to it.