If you are using a 100%-In-One-Game Guide, then there's your problem. All guides on the internet save one (including the one on this site) are carbon copies of the guide used in the BradyGames strategy guide, which has a few problems with it. Go here:

Final Fantasy X-2 FAQs - Final Fantasy X-2 Walkthroughs - Final Fantasy X-2 Guides

and go to the guide called "Perfect Game Walkthrough". This is the only guide I've seen on the internet has fixed those two or three bugs in the BradyGames guide. Use this one, it's better.