I have an artisan KitchenAid mixer, model KSM150, everywhere on the internet, including in the KitchenAid site it says that there are 10 working speeds, but the speed selector on my mixer has only 6 working position (and another one for off), there are also corresponding markings on the mixer which are fitting the same number: 1, 2, 4, 6, 8, 10. See in this picture from the internet:
Where are the 3, 5, 7 and 9 speeds?