I am truly sorry for forgetting to mention this earlier !! Most every problem I had in my first year were things loosening up- such as the motor/auger setscrew connection. Have you tried checking tightness? Also, when I first got my stove and I spoke to tech support, the tech told me to loosen all the bearing block bolts, support the auger in the middle of the bore and tighten the bolts down. I actually went a little higher because it will settle. Due to the tolerances of these parts, you can sometimes move the bearing block rotationally 90 degrees at a time, and that will get you in the middle as well.
Bill
Bill