I don't think those are the same breeders,
The breeder Christina Leon is in Providence, RI
Providence Dobermans is in FL and the breeder is listed as Tamara Young on Dobequest.
That being said... I second Sam1491, they do seem to be making an effort. They are testing, they're competing and titling (though IABCA is useless. All you need to do to register through them is say that, to the best of your knowledge, the animal is a purebred. And its just as easy to title under. You may as well make up your own registry, give your dog titles yourself and save yourself the fees.)
IABCA's registration page: HERE