This is a stupid question, but I'm going to ask it. Are you running it multiple times a week with the same character? Cause if you are you only have a shot at loot once a week per boss, per week, per difficulty. If you do hard first it also voids normal loot from bosses, so always do normal then hard. Im only checking because so many people still don't understand that they can only have a shot at loot once a week per toon.