I haven't read the entire thread, but I'm popping in here to say that this happens in many different kinds of typing people. I have seen it on style forums, where the group is working with different styles each having a set of parameters, and someone declares herself to be a match and belonging to one of them, and the rest of the group is like, the hell you are, for pete's sake, are you blind, and calls her out at every turn. What we came to see is that over time, the person miscategorizing herself would eventually realize that she had miscategorized herself on her own. That in the meantime, she was enjoying (for whatever reason) believing that she belonged to the type she assigned to herself. So we learned to leave it alone or very gently occasionally suggest rather than to call the person out. It's not how that works here.
The thing is, if people here think you are no freakin' frakin' way a whatever you say you are, they're probably right, actually. And they're probably old timers here, who have seen this play out so many times that they don't have patience for it anymore. They really can see you coming a mile away while you're still struggling to find your outline in the mirror in the dark. FWIW.
Edit: In other words, what Orange said.
I have had similar experience with astrology. I was taken to a party once by a friend -- I didn't know anyone there but my friend -- I was asked if I could go around the room and say everyone's sun sign. I did. The way I knew who was a Virgo was because he immediately said astrology is bullshit. :-D See how that works? That's the kind of people you're in with, on the typology thing. They know not only that it walks like a duck and quacks like a duck: they know all the duck calls, how lame ducks walk, how young ducks walk, they speak fluent duck in many languages.