On your baro damper, it should be set around the .02 - .04 (2-4) position if you have the Field Controls type with the weight knob on it and it should be on the proper side (left or right) depending on Vertical or horizontal mounted. You may be loosing some heat up the chimney and that's why you may not be getting enough heat out of the stove.
It has to be adjusted properly with a manometer (draft gauge) hooked the stove.
It good you checked it with your match test, BUT, it could be drawing a lot more than you want it to and wasting heat up the chimney.
80 degrees! Wow, try to see if it will maintain 70-72 first. Make sure the thermostat is level and you can hear the stove thermostat relay click on/off when you adjust the thermostat temp up/down.
On a full burn when the thermostat is calling for heat, you should have about 1/2" - 1" of ash at the end of the grate, if you pushing hot coals off, back the adjust out (counter clockwise) about 1/2-1 turn and then let it settle for an hour or so and check it, it will take time to Dial-in the stove adjustments, just don't do major adjustments at once and always wait a while for it to settle back down.....
Keep us posted!!