This is just an idea that occurred to me suddenly, I don't know if it actually has any merit or will hold up against other evidence presented in the show but I felt the need to put it out there. I was talking to a friend who was upset about the way Charlie looked on the plane in the S6 premiere, and I was explaining to him that, as Dominic Monaghan is not returning as a full-time cast member and is working on other roles, it would have been unfair for the showrunners to ask him to grow his hair out or whatever for these guest appearences. And since it's an alternate timeline or reality that it doesn't really matter anyway. I reminded him that Charlie looked similar when he appeared to Hurley in The Beginning of the End. Then it hit me. What if the Charlie that Hurley saw at Santa Rosa was the Charlie from this alternate timeline/reality? It might kind of explain the cryptic line "I am dead, but I'm also here." Just an idea I wanted to share.