How many different breeds are there of pitbull dogs?

Not true.....there is only ONE true breed and that is the American Pit Bull Terrier. There are different variations and blood lines but those have just been breed buy certain breeders until they got a specific look that they wanted, such as the Colby line and so one. There is no such thing as a red nose or blue nose pit and I have one of both....they are just colors.