Yeah I wouldn't count on that breeder for anything. Most breeders refuse to give away two puppies to people unless they know they are beyond experienced in not only the breed, but raising puppies. So yeah sounds like you got your pups from a less then stellar breeder.
If your interested in working your dogs, what you'll want to do is get them neutered/spayed and then register then with the UKC on a LP (Limited Privileged Registration). As someone pointed out APBT
's are NOT able to be registered with the AKC (Amstaffs can be) so unless you have paperwork for the parents your out of luck. Again if your planning on working your dogs you can spay/neuter then and enroll in the AKC Partner's program where you can do agility and obedience and such sports with them.