The ash is normal and the difference in temp between the controller and a third party thermometer is well within the norm. Also, most pellet grill temps will swing at least +/- 10F, and my DLX was much worse. I've never measured the temp of the drip pan, but it doesn't seem unusual. I'd expect it to be quite a bit higher than the air temp that the controller is measuring.
Getting back to your original problem, did you have a lot of sugar in your rub?
Yes I had some sugar - it was this recipe -
http://www.slapyodaddybbq.com/2012/02/syd-all-purpose-rub/.
While I understand sugar will burn sooner than fat, etc... if anything drips on a 400 or more degree metal plate it will burn.
I never had a problem with the pellets and wet, unit is stored in the garage between uses.
Cust Service said the ash level blowing around in the pit is expected.
They are testing a grill today to see what the temps are.
They are saying I am the first to bring this to their attention, which seems odd to me because of how this oven is designed. She was explaining to me how this oven works... which I get... it needs to be hotter closer to the fire box and the fans will blow the heat around the grease pan .... but if the grease pan is 75 to 150 degrees over your set temp things will burn as I see it. Any metal plate that is close to 400 or hotter will burn things.
If your pizza has some cheese and toppings fall to the bottom of the oven in your house, especially a gas oven, it will burn and stink. Same principal... lots of direct heat under smoking hot metal and heat rolling around the edges onto your food.
I will test again tonight with my set temp lower and see what the grease pan and lower grate measure.
Seems like I will have to insulate with foil or metal pans between the grease pan and lower grate to keep the burning to a minimum as I see it.
thanks haeffnkr