Yes....there are some "weird" styles around, but what is the object of the game?? To knock down more pins than anyone else. Now I know that I'm far from text-book, but it works, just like Belmo's two handed style.
I don't care if you bowl right handed, left handed, 2 hands, forwards, backwards, through your legs or standing on your bloody head....if it works......GOOD. As long as you can repeat it under pressure, it's the right style for you.