How do I organize my ipod?

So a few weeks back while I was syncing music onto my iPod, something magical happened. It completely alphabetized all the artists on my iPod. All the bands that started with the word "the" were all together, and same thing with all the bands that started with the word "A" :) It was soo easy to find everything and all my music was where it was supposed to be. that is until recently, about two days ago, I again added music onto my ipod and when It finished syncing all of the artists were scattered again. anyone know how to fix this?