Some times you just need to go with your gut instinct. I agree, that he definately is not a 100% cavalier BUT he is gorgeous none the less
I would try to get over the whole episode and not let it eat you up, What's done is done and there is nothing you can do about it that will remedy the situation. You have him now and love him dearly (he looks so cuddly).
It is sad that you were decieved (and I am sure the Breeder would have known) BUT, you have a wonderful little fella in August. Enjoy him