The first time I did butts, I learned about the plateau and the fact that a 9-12 hour smoke could go 14-16 when you are having a hard time keeping a temp above 205. This time, my 2 butts weighing a total of ~17 lbs went on at 6AM, and 4 1/2 hours later, one is up to 185. My temps have been unstable, running from about 220-260, but that still seems too fast to get up to that temp. Any thoughts? I'm hoping that it's a late plateau.