So I was thinking about LOST today and probably like you, I’ve been wondering why the dual plot lines. One moment, Jack and crew are still on the island. On another, he’s landed safe in LAX. But why? Here’s my conclusion so far.
In the end, they will go back in time, blow up the shaft again, and the show will end with Jack and the crew landing in LAX. As to the reason why Jack had vague recognition to the other passengers has to do something with him being the hero. At some point, he will have to lead the way and separate himself from the rest resulting in them living a normal life and Jack having recollection.
There. It may be right. It may be wrong. What do you think? (comment below)