For some reason my stove loves North American and hates Stove Chow. Chow does not burn well in my stove, pellets piling up, lazy flame. I have been burning Firesides all winter but my HD was out so I got some North American and Stove Chow. North American has bright white/orange flame, nice and hot. Stove Chow not so much. Pellets burning slow - maybe bad batch?