Over the weekend I smoked a brisket and 2 pork shoulders. I started the cooker the way I have a number of times before but for some reason it got hotter than I wanted. I lit about 3/4 of a chimney full and dumped the rest of a 20lb bag in the ring. When the chimney was ready I dumped it on top with some wood chunks. I assembled the cooker and let it go for about 20 mins while I prepped the meet. I had my stoker set at 230 and the other two bottom vents closed. The top vent was open. When I placed the brisket on the temp was 290. It stayed around 290-300 for about the first 2 hours. I scooped some lit charcoal out and closed the top vent half way. After about another hour it finally came down to 250. I am thinking I put too much lit charcoal in. Any suggestions or comments?