I think I had that problem too ... last time I used the tray I gave it more time with the torch and burning and it worked better, but was using in the BGE with UltraQ forcing the airflow ... think I may still need airflow or placement improvements in the Pit Boss vertical.Good air flow is important as are dry pellets but I also think people don't let them burn long enough or hot enough before blowing them out and letting it smoke..
And is it just me, or does that look like too much billowing smoke coming from the PIG?