After getting the the stove running HOT 580* I started to cut back the airflo in 3 stages. I have noticed that when I cut it back all the way (off) the temperature drops down what I think fairly quickly. When it dropped to 500, I opened the flo a tad, (1/4) because I was afraid of it cooling down more (I'm enjoying the heat). Does this happen to others? Do you leave a little airflo? Also, I noticed that when I close it all the way, I see very little flames, and almost no secondary burns. Does this too happen to others as well?