I've read the sticky & so many other threads that my eyes are crossing. my question is that when I've smoked a butt intended for pulled pork it comes out like a roast. it slices well& tastes great but it won't pull. I smoked them low & slow, with & without foil, seared & not seared. what am I doing wrong? the last two times I smoked them 4-5 hours finished them in a crock pot. that worked but i'd like to figure out how to do this in the smoker.