I totally understand why you're finding this painful/unsettling. Those pics are going to potentially open old wounds.
My 2 cents on what's going on? I remember before you said that he was treating your son as if no time had passed since his crisis began, almost a picking up where things left off in his interactions with him. I suspect that is what's going on here too. We all describe what they're in as a fog and the literature that gives the MLCers' perspective supports that. I would guess he is somewhat emerging from his fog and under this impression that if he picks up the threads of what he does remember of the past, that this will create a feeling of stability for him. This might also explain the emails to you where he is bringing up music or other things from your past.
The problem, of course, is that while he was in his fog, your life changed drastically, and you remember ALL of it. You also have become a very different person. Maybe he has, maybe he hasn't.
If he is making you sound like you're the one with the instability, look, he is projecting AGAIN, just about something different than he might have years ago when he was blaming you for marital problems and not shouldering any blame himself.
It sounds like he wants his way out of the tunnel, but he still resorts to his old patterns, because he hasn't done any work to break them or learn about what makes him tick where you've done nothing BUT that.
I think you're right to be extremely wary of the potential for him to hurt you, so all you can really do is detach, detach, detach and try not to get caught up in his drama. But if he keeps pushing you to "go back", you're going to have to decide if you want to try some sort of "piecing" with him or not and then go from there.
M45 Bomb 6/09; EA 6/10; Divorced 1/11 Proud single mom of 7 little feline girls and one little feline boy "Fall down 53 times. Get up 54." -- Zen saying