The response I got from GMG:
"Changing the climate settings on your grill will change how aggressively the auger and fan run in the grill and can also change the temp in the grill left to right you will need to make small adjustments to the heat shield to get everything balanced back out after adjusting."
I guess I will leave it on one setting and go from there. I really don't want to have to recalibrate and move the heat shield everytime I change the climate setting.