If you want true Ameraucana, you need to find a breeder that breeds to the breed standard. Not someone who lets one rooster breed everything in the flock. If you want a specific breed, you need to know the standard for that breed. That way, you don't end up pay for something that's not what you thought it was.
I completely agree. :) Luckily I wasn't looking specifically for Ameraucanas, I just wanted to hatch out some eggs under my broody. But I do think that when someone tells me they are selling Ameraucanas (advertised as such) I should be able to trust that, even if I was less informed that I should have been. I know now to be more skeptical.