Well, it does sound a little quirky, but I guess it's just not one of those things you can say that don't have to be logically correct. Either that, or maybe "just" in these sentences doesn't refer to how the event happened, but to the fact that the circumstances are irrevertible or simple to comprehend. For example: There's nothing you can say, that's just quite how things happened. In this sentence just could be replaced with simply. Another example: I'm not angry, It's just quite a mess. Hope that helped.

propably the best thing is take everything "just how"-to take everything easy ( even sometimes it is not so easy to take things so light). Like one of philosopher said : I know that I know nothing.

You're right, it looks a little strange but it can exist easily in common spoken English. "That's quite how things happened." Quite here is used to emphasise "how things happened", as in "quite good" or "quite angry". More like "very much", but not as sure as "that's definitely how things happened" (still, very close). "Just" means simply, of course.

quite = exactly quite how = exactly how (things happened) Now the rest should be clear.

Hi Aroso, more natural would be "that's just how things happened", quite makes it less sure, less positive, and is used more in the negative sense. but the opposite would be "that's not quite how things happened". Because you are contradicting someone, it softens the expression without being quite so blunt.