I have had mine build up fine dust in the bottom of the auger that caused these conditions.
Manufacture date is Jan 2012, it was the 22nd one produced. I've used it a lot, but it has always been stored inside.
I smoke wings for 1.5 to 2 hours and always finish wings off in a hot 450 degrees preheated oven (on non-stick foil in a half sheet pan)...
Never heard of one of those. Probably a regional name. Take a pic so we can see it. And good luck on the cook.
I don't worry about consistent temps, FE always believed that you needed swings to get more smoke flavor on pellet grills. Smokin'...