I am one guy who has no relation to any of the people you are speaking of, and I am in Canada.
At no point did I say you were running more then just regular paper, just mentioned it is the major cause of damage.
There is a big difference between 62000 and 200000, but not nearly so bad if the +/-50% is true, and it likely is, so the reality is you got 62000/100000, and even 62% of expected, still not good, but better.
And 45000 is more than half of the 800000, it Sofia is right, and I have no reason to doubt her, it was expected to get 40000.
You got 113% of expected there.
So the drum is where it should be and the fuser is not.
Again, knowing nothing of you, or the supplies you have used, or the environment it is in, humidity level etc etc I can only make guesses.
If the dealer did not disclose info during the sale of the device, I'm sure Xerox would like to hear about that. You can find localized support lines here