Were you using a newer smoker with the ramp?
Was the wind blowing. I was smoking some brats yesterday, and the wind was fairly strong. Played with my temps a little. Then took it to our scout camp in the afternoon and did a load of chicken. By then the wind wass gustting about 25-30. Kept turning the smoke pipe to try and get away, but I really needed to move the trailer.
RandyE