The average of all 4 grades must add up to 9.5 or higher. In both case the average is 9.375. Its a 9 not a 9.5
I dont know about 8.5 subs and getting a 9.5 but Ive never seen a card with 2x10 and 1x8 before. Doesnt make sense to give a card a below par grade but average it out to a gem mint.