Part of the most of the pet contracts I have seen has been that you spay/neuter and when proof is sent back to the breeder, you get the paperwork. I think she is pretty and their markings can and do change as they get older. In terms of size, she looks about the same size as my girl. Most girls I have seen are petite but tend to make up for their size in attitude.
I would follow up with your breeder again regarding the paperwork. In terms of getting another, I would decide what you are interested in in terms of color and markings and then look around for breeders that can show pictures from previous litters and do all the testing they should. The only price differences I have seen is pet vs. breeder quality kittens, retired cats tend to be cheaper (but the breeders are very picky about the homes they go to), and if a kitten is older they may give you a cheaper price.
I am from the midwest and there are a decent number of breeders around me, so that is what my experience is based on.