I think you guys are reading too far into it, it's probably just a design element for the teasers. I'm sure she doesn't really have hair that long lol. Didn't someone mention that they made that wig special for the portrait?
I wish this show was a Netflix original so I could watch the whole thing and not have to wait week to week lol. I think watching seasons 1-3 episodes online back to back was so much better of an experience