You should have been able to see the dam and possibly sire and dam of the puppies, mhsrunner18. This would have given you a good idea of how large the pups were likely to grow.
Certainly the woman is a BYB and irresponsible to be breeding these dogs in the first place, so it is likely, that some of what you were told, might not be true. Of course, she might have rescued the bitch, already pregnant.
I wouldn't worry about paying money to any of the companies which profess to tell you what breeds your pup might have in her background. Most are just scams.
Like others have said, there are many breeds which have the markings, as your pup displays. Markings don't necessarily tell us much about the background of dogs.
Darling pup you have there. By her weight, I'd say she will remain pretty small. If the pictures are current, she needs her nails clipped.