So I guess that made sense.

I imagine the change, what with Jon going north to kill that mutineers, Bran & Hodor & Meera & Jojen getting captured, etc. is more of a function of giving characters things to do. I mean, Bran isn't even in Storm of Swords after he crosses the Wall. Jon has a lot to do in the book, but it's clear that they want to do one big battle, rather a battle drawn out over five episodes. Some of this stuff is a little weird, but I understand.