Checked all the pages, didn't see a thread on this. So, there is something, even after various replays of this game, I still find questioning, The Fayth told Tidus at Gagazet he was dream of course, and that he was part of the dream world the Fayth had created from the memories of the previous Zanarkand.
The Fayth said all the memories of the people and locations were recreated as a dream. In that case, is Tidus a dream of himself 1000 years ago? As the dream Zanarkand was said to mirror the people and places that existed when Sin ravaged the place...