I recently beat X, it's still one of my favorite games in the series but i'm still unsure about exactly what was going on.

For one, the fayth (maybe he's Bahamut since he has the ring on his back) said that Tidus and Jecht are now more than dreams, because of their relationship to Sin. Also, you see Tidus' dead mother in the farplane, how could a dream of the fayth be a fayth? Also, the ending shows Jecht with Braska and Auron in the afterlife, and Tidus goes towards them. It seems like Tidus and jecht aren't supposed to exist, but because of what happened with Sin, they do, but because they're 'creators' stopped dreaming, they weren't allowed to live and had to go to the farplane as dead people. so what the hell is going on????

And if they aren't real, how the hell does Jecht get to Spira in the first place??? Is this in a Jecht sphere or X-2, if so just letting me know that would suffice.