Fringe typo or tease?

Watching Jacksonville, last night's new episode of Fringe on Sky1, I was struck by this apparent spelling mistake in which "Manhattan" is, quite clearly, missing a second "t".

Firstly, I thought the makers of Fringe were in serious need of a proof reader for their titles. But then it occurred to me that maybe this is the correct way of spelling Manhattan  in the alternate universe that, according to the mythology of the show, sits alongside our own.

And so this typo was a subtle way of telling the viewers that, contrary to appearances, we weren't in real New York.