You guys messed up your own plot! The script forgot in the end the key elements of the movie. The end would have been a whole lot different if the writer understood what he was writing. How come Jess didn't have Deja Vu in the end? In fact forget the end the movie would have not reached its climax because it was pretty obvious that she had figured out everything then why did she went on killing. This is what happens when the writer and the director don't focus.