he "ascended". he didn't "rez into heaven" he rezed and then later went to heaven in physical form. IIRC there was one other prophet guy that did this too but can't remember who.
(but of course, note that this is all just a scam. "ascension" is just the way to explain away how he both resurrected and yet still isn't around anymore. and IMO in between they had some random guy pretend to be him which is why no one who knew him recognized him.)