Dead And Alive

Something just occurred to me.  In the cast listing for upcoming episodes, the actor who played the Evil Queen's father is listed as a character of Storybrooke.  So that means even characters who are dead in Fairy Tale can still be alive in Storybrooke?  Can David be himself and his twin, simultaneously?  And that accounts for his blackout?  Just a theory.  Hmm... Or the curse is weakening, and he's going back to the way he entered Storybrooke?  He had been stabbed by a sword as the curse was enacted, so if the curse is getting weaker, he could still be injured when he "arrives."  Just something to think about.