Sam, with what you describe, I highly suggest you check that chimney often; like at least monthly. Even if you have good dry wood, burning like that is not good. You need to determine why the stove is starved for air. Perhaps you need to install an OAK. Also, the stove can be starved if someone is running a clothes dryer or exhaust fans. Something in that house is not allowing air to get in or else you have a blockage somewhere. Also, you may not want to close that air all the way and you need to experiment with that. Perhaps 20-25% open rather than closed.