How did Jasper not recognize the photo of him and Callie?

How does the fact that it already happened before decrease the likelihood that it could happen again? In contrary, it's this fact that makes it so convincing for Jasper because it was not some outrageous, impossible-to-think of scenario but he actually had her before, so going back there would seem quite easy to do. In particular if you are an insomniac wacko on drugs with omnipotence delusions.

Regarding the picture itself: Would you recognize in this situation a scene from an outside perspective (!) of you (from behind!) screwing around on a drunken night weeks ago? While firmly believing that this is the "new" picture showing the future tomorrow? I don't think so. Just because they had sex before in this spot doesn't mean they couldn't have it again in the future. Except of this vague parallel, there was no real indicator that could have given it away..

It was explained that the night that photo of them was taken was on "drunk Charades" night. A previous conversation in the movie (when trying to remember when the coat rack was knocked over) talks about how wasted they got on "drunk charades night" and they don't remember a thing.