BK Princess need help

I just installed my new BK princess about 2 weeks ago. Not what I had imagined. I have 8% red and white oak and red elm. I'm getting an average of 3 hour actually burn times. I do get an impressive bed of coals. My house is 1064 sqft down stairs with a fairly open floor plan. Upstairs is 354 sqft. It seems to struggle to reach mid 70's while mid 20's outside. When I first started burning I noticed the thermostat wasn't working correctly. I was advised from the factory to take the rear cover plate off and control it manually until my new thermostat comes in. A little discouraging considering this is brand spanking new and not cheap. I've done the door test multiple times. My pipe is double wall 6 inch from stove to cap. 2 feet up to 2 45's, 2 feet out the wall, Tee and cap, 15 feet up. This is about 5 feet higher than peek. The main thing that concerns me is I have a lot of flames all the time, no matter the temp, when I thought it was supposed to be a smolder. My stove top hits between 400° and 650°. I'm ready to pull my hair out. I would appreciate any feedback. It's my first cat-stove. I have burned wood my whole life. I'm hoping the new thermostat will help with burn times, however am more interested in adjustment to bypass door. I haven't found much information on it other than 9/16 is the bolt size.

I don't have the new thermostat yet. The butterfly seems to operate fine while cold. Once it heats up it closes and chokes the fire out completely

I did what you asked. I weighed the wood at 32 lbs. 3 pieces of red oak and 1 piece of red elm. I loaded it at 9:00 p.m. The coal bed was about an inch under the door. It burned 4 hours before turning to coals and temperatures dropping. I just loaded it again nearly the same. I will be getting up to load it again in about 4 hours. I did notice when Turing the dial for the thermostat that the dial turns way past the 1 setting counterclockwise to about 10 o'clock and past 3 1/2 clockwise to about 8 o'clock. Is that normal?

I am closing the bypass. This is why I wondered about the bypass adjustment. The stove has a lot of flames. I'm getting air from somewhere. I need to get a thermometer in the flue pipe somehow to check my true flue temp. I had single wall to begin with and it registered around 250°. I have the same thermometer on the outside of the double wall now and it reads around 100° but that is not accurate flue temperature. Just kinda lost. I'm anxious to get the new thermostat to see if there is a change. Hopefully I can get that cruise control effect.

That was open 1/8 " for all 4 hours. I couldn't load anymore wood than that. Like I said the coals are filled up to the door leaving 9 inches of loadable space.

I understand the coals produce a lot of heat, however while reading on 30 hour burn times, I didn't believe I would have to get up in the middle of the night to rake coals for extended heat. I got 4 hour burn times out of my old wonderwood smoke dragon. I have also burned 3/4 of a cord. This seems excessive compared to many other people's post. I'm not trying to downgrade this stove. I believe there is a issue with mine or the operator is an idiot. I'm just trying to get help from people that know these stoves better than I do. I work 10 hour+ days and was looking for a stove to maintain the heat while I am gone. I will gladly try anything suggested to figure this out

When it's completely closed it will not have flames, however within and hour is almost out where you can put your hand on the top of the stove.

I have also tried loading it front to back and side to side. Has anyone noticed any difference either way

We had a storm 4 years ago that uprooted all the trees. I cut the root balls off that winter. The following spring I brought all the wood home and split it. It's been seasoning since. I'm do have a meter and it's sitting around 8%. I have tested a few pieces at 11%. It's not doughty. It's all cut between 16 and 18 inches. Most is 6 to 8 inches in diameter splits with some smaller for tight fills.