I have head that certain breeds, they have the full gene description; other breeds, they have only part of it to test against. So this does impact the results some what.

As for a dog having a certain breed but not looking like that breed at all: Zeke is a rescue dog in Willy's class now. He has triple dew claws on his rear paws. Apparently, only Great Pyrenees, have this so he has some G.P in him someplace. He looks NOTHING like them, lol. He is a sweet boy, Willy likes to play with him.