2013 Silver Maple Bullion Quality

I have to wonder at what point the guy working the press (or whatever they call the machine that stamps these coins out) says to his boss, Hey, I think we got a problem here. Does the boss just let them go to make the daily run quota? Or maybe there is a budgetary driven philosophy of each set of dies runs 40K coins before it is pulled out of service, as long as they are still round, we don't care what they look like! Then I wonder what the last coin looked like from the set of dies that made the ones I got, did the Queen have a beard as well as the moustache? Scary thoughts from a Quality Control perspective.
Then also, what makes a coin an error? You take something that has the double die impressions which are obvious errors, then take the Queen with a moustache, is that just poor quality or truly an error. I know that the Coin World must have guidelines for this kind of thing and I'm just too new at it to know what it is. At what point does a coin become an error. From a coin nubie, if you asked me to define an error, I would define it as something produced not as intended, but even that would be very subjective and could be strictly interpreted to fit anything but a perfect coin. Guess I have some research to do!

At least I find my "moustached Queens" kind of funny, so I think I'll keep ‘em just because of that!