It's so confusing, but then...this is Lost. xD I'm more concerned about the people left behind on the island. Does this mean the Oceanic 6 end up trying to get back to their normal lives, and don't do anything to help rescue the others? >_>

Plus, they're acting weird - Jack turned to alcohol, and went psychotic. Kate stayed the same, I guess; except the mystery of Aaron. Hurley went a little insane, and Sun seems to be fine, except that Jin is presumably dead.

So, I'm assuming the horrible mistake, results in the deaths of a few survivors. Assuming Jin is dead, he may be one of the victims...and possibly Claire, since Kate has Aaron. Just a theory.