Gah, smurfWell, I wasn't entirely wrong, I guess...
And also, Anima was not Seymours final Aeon, Seymours mother was accepted as a Fayth, different from the Fayth decided for the Final Aeon. If she were used as the Fayth for the final Aeon, she(her Fayth) would have disappeared after the Aeon was called, as it is implied in the game, and Yuna could not gain her as an Aeon. Also, the Fayth is at Baaj Temple, and I have no idea why, but that would mean it is not at Zanarkand.