I'm sorry I'm so late to this thread but just in the hope it helps let me add some additional "data". We have a Regency CS1200 which is 1/2 the size of the significantly larger 3100 but uses the same primary system and secondary system, baffle system, etc. The CS1200 will more than heat our home of approx 2000 sqft (that's including some "unconditioned" spaces that the regular furnace really doesn't do) without any worry even on coldest of days. Now we have taken extreme efforts to really tightly seal the home and to really thoroughly insulate the home and that always helps. Additionally we always run our furnace fan on fan only and we have returns and supplies on each of the three levels of our home. Lastly we happen to have cathedral ceilings leading from one level to the other levels (which typically would probably make things that much harder to heat but in our case it seems to significantly help with heating everything).
My point is that there are always differences in design and insulation and integrity etc of the structure but assuming you are not working against leaks and lack of insulation overall, I would have to add another vote to the fine folks who have already suggested above acceptable levels of moisture within the wood because that "big" 3100 should have no problem pushing heat to at least around 75 to 80 % of your home. I cannot remember the link that someone posted that sort of summarizes the science of heating with wood but basically, as others already mentioned, before you burn anything at all you dehumidify it down to nothing so more moisture is slowing the fire, cooling the fire, cooling the chimney, producing more problems with creosote, soot, smoke, etc. It sounds like you have a huge amount of wood readying itself for another winter and that is terrific but it also sound like you should probably start looking for some other source of seasoned wood so you can enjoy that excellent 3100 now. Hope that helps.
Ohh by the way to contact the manufacturer use this telephone number: (604) 946-5155. They are terrific about answering any questions. BTW, when I asked them about the max temps they also said the same thing about "not letting it get to glowing". I accidentally laughed out loud and said "seriously" and they told me "yes". After asking much more about my specific situation they told me that the 800 degrees I was running with regularly is totally acceptable and they simply suggested not running regularly above 1000 (measured from the top of our firebox not from the top of our stovetop which was separated by an airspace of 1/2 inch or so and therefore about 200 degrees cooler than top of our firebox). But to get the thing glowing you would have to have temps of almost 1200 degrees. In any case they don't seem the slightest concerned about running at 800 all the time. Ohh one other thing in the hope it helps, maybe I misunderstood what you were saying but if your stove top thermometer is off in measuring its cold temp, the hot temp is not necessarily a linear increase. It may be linear or it may not be linear but I'd softly suggest getting another accurate thermometer to help you have better results all around. Again hope all this actually helps.
I will post pictures tomorrow. I agree the stove should be blasting, totally, that is why I am here! 
I hope you get it figured out.