I just ran in to one of those massive annoyances while working on another PlayStation SDK tutorial covering the SpriteTile class.
A SpriteTile is used to group multiple sprites together in a single texture. There are literally dozens of utilities for packing sprites and every single one of them starts at the top left. For some bizarre reason though, SpriteTile starts from the bottom left!
So as I was flipping through my sprite structure, the on screen results were almost inverted… this would be the reason why. So, if you are working with SpriteTile, be aware of this!