My first time attempting pulled pork. Following the suggestions from several previous threads, I put my 5 lb boneless pork butt in the oven at 225' last night, intending to slow cook it to an internal temp of 195-200'. at 7 hours my meat thermometer said 160'; at 8 hours - 160'; at 9 hours - 165'. Is it possible the pork is still far from done? It seems cooked through, but definitely not falling apart tender. I don't mind leaving it in the oven longer, but I don't want to turn it into very expensive pork jerky. And I do need to leave the house eventually, which I'd rather not do while the oven is on . . . thoughts?