Ive got a 2.69lb Boneless Boston Butt on the Egg now. Its been cooking for 6hrs, grid temp at 250deg. Internal temp is only at 160. From what I have read, I should allow 1.5-2hrs per pound. Also, I know to cook to temp and not time. But this joker is a little over 2.5lbs and 6hrs later I still have about 35deg to go. Am I missing something here?