You seem to want to say that such an animal cannot exist, when apparently, it does, and often enough. I know people with enneagram types that supposedly occur less-frequently, like estj 7's and istj 9's. They just have conflicting interests within the same person, and it manifests itself in an interesting way.
(In the estj's case, it's just a more rigid, law-bringing guy who likes getting massages and having parties, and hanging with friends. Actually, a good combination, because when you attend one of his parties, you know that you will be safe, no matter how much you drink.)