brotherhood

First time I played ffx I thought that I customised Brotherhood with waterstrike, but now I have same thing in my second game and I´m sure I didn´t customise it. Has this happened to anyone else??
This is annoying, because I don´t want it to have waterstrike and I can´t take it away. :(

It happens to everyone. The thing is, you don't customize the Brotherhood. After the scene in the Farplane where you see Wakka talking to Chappu, it automatically customizes.

Yer, i dunno why, it just dose, but after that, thats the sword i use for the rest of the game :D except when im fighting water fiends, or leveling up, i have other special swords for that.