Well take some solace in knowing you were not lied to or Mis-led like most.
Paul Smith is one of the top Breeders, Very Well known and respected.
Anomalies happen, especially in such a young and developing breed as Ameraucanas.
Before you dispatch that bird, as has already been mentioned contact him.
No one, not even the OP, suggested dispatching the bird. She was told not to use the bird for breeding.
There is no reason to breed a bird that genetically is not correct for that variety. Paul will tell them the same thing.
Mother Nature throws curve balls sometimes and poo poo happens.
I think I was the one that said I might give him to a friend. Other than being disappointed, It helps me make a decision as to which group I will concentrate on. Life goes on.