I had this problem too... Amy does do sort of a "flip" of the yarn. If you don't do it, it will mess you all up. It is a very small motion... but hopefully if you know what to look for (at the very end of the stitch) maybe you'll see it. After you "get that" part of the cast on it is SIMPLE!
It's better to be hated for who you are then be loved for who you are not ~ Van Zant