I wonder if any of the grading services (including NGC) ever considered something like an an OPINION fee. Add a check box on the submission form that states for $10 you can get a detailed explanation of why the coin got a details grade or could not be graded at all. Just think of all the extra money they could rake in along with all the other fees they get these days. It would take a grader less than 10 mins to input an opinion into the computer and then it gets printed along with your receipt and mailed back to you.
MAN that would save so much speculation on OUR part as to why these things happen.
As always the above is just MY OPINION....
Have a great day
What financial incentive is there for NGC to do this, when many people fail to see the problem. As a result, they submit the coin multiple times, allowing NGC to acquire the same fee multiple times. This sounds wonderful for NGC to me.