You are indeed very fortunate to have gotten your hands on a mysterious limited edition FFX with a completely different battle system to the regular version. I recommend heading down to your local game shop if you wish to gain the full FFX experience. If you live in America get an import (or the 'International' version?) for an even fuller one.
A played a mysterious limited adition? SWEET! But naw, I'd rather not spend my money on the version everyone else is playing. I love my version and its just sounds like it was cooler than the other version. But thanks for the reccomendation....its highly appreciated .