"Settled function orders" is an oxymoron to me.
I view the human brain as a work of art, if you will.
So to take that masterpiece and turn it into a paint-by-numbers,
is less than acceptable.
Long, long ago when I were a wee freshman in Philosophy classes, the perennial freshman favourite, determinism, was getting tossed about. One of the profs favoured a Radical Freedom position. He said, yep, determinism rules a la science, but right at the last minute it's just true that there's a gap between conditions leading to the decision and the decision, and in that gap, you can go either way, nothing constrains you. Another prof didn't like this position so much. He said radical freedom is actually the opposite of what one wants, for it means all that you were, all that you have done, all that existed is in principle nothing with respect to your choice. Indeed, he said, with radical freedom, there is no "your" choice because everything that constitutes you is in principle not involved in the choice. He went on to say that while every condition leading up to your choice was, is, and always will have been determined prior to your choice, still your choice is free because one is able to be aware, at least at a macro level, of the conditions that lead to your choices, and one is able to step away from their determining force by considering them in abstraction. The mind as an object in itself becomes one of the determining conditions that lead to your choice.
Thus, *deep breath*, I'm okay, indeed pleased, with determinable function orders and preferences. If the functions are just washing around out there willy nilly, where's the personality? It's found in the dynamic jumble, the overall governing principle behind the chaos? Could be. But that sound a lot like a ghost in the machine.
So I'd say if there's INTJs with different function orders, they're mutants and should be shunned.