Why is my Butt done??????

Eric

Set the temp about 225 and put 2 butts (5.5 and 6 lbs) in around 9 pm last night. Last time I checked at 11:30 pm the temp was around 240. I closed the vent just a smidge and went to bed. 5:30 am I get up and the temp is around 230. Should be perfect except the big butt is showing a 187 with a polder. I repoked him and got 190 (close to the bone is 167). I poked the smaller one and it is real close to 200 in a couple of spots. Why are they both done after only 8 hrs?? I did make a slight mod by hanging a metal pan from a Brinkmann water smoker just below the grill to catch drippings. Surely it didn't act as a heat reflector and cook the butts faster. Any ideas? [p]I am going for a 30 minute run, remove the meat and then wake the wife to tell her our picnic is 6:30 am not pm!