So I've been test running my new St. Croix Hastings. The things fires up real nice and with the initial start up burn, the flames are a good 6-8 inches high, and then come down slightly after the first startup pellets burn, then the auger kicks in every few seconds, and I've noticed at least on the low setting that occasionally enough pellets drop to where I barely see the tips of the flams out of the burn pot. Then if on the next few auger turns, not as many pellets drop, it catches up and the flames come up again to about 4 inches which seems to be where I would think they should always be. My concern is shouldn't the flames remain a pretty consistent height? I'm afraid that if I leave the stove on for a long time on low, that the flame may die out if too many pellets drop and the flame can't keep up. Is this normal?