No. When you name them, you don't have to have numbers. Audya will insert numbers automatically for if you want to recall them in the future with numbers rather than alphabetically or scrolling through manually (saves time).
Thanks AJ, that's what I needed to know. I would like to have rearranged the order of my registrations putting the ones I use the most at the top of the list but if the Audya assigns numbers for us then it is not possible to arrange in a desired order.