Smoke in the bedroom?

[toadshade]

This is something that has bothered me for a few years. I am in Atlanta GA, so we have a very late start to the year compared to most of the people on this thread (I imagine). At the beginning of every year, I smell smoke in our bedroom when it starts to get the coldest it will for the winter season. Our bedroom is the furthest from the stove, and therefore coldest of the rooms so I thought it might be as simple as a pressure differential. That is, smoke that has come from the stove when opening the stove door and making its way to the coldest part of the house after cooling. It is something that keeps me up at night when I notice and right now, I have a CO monitor in the bedroom (measuring 0 ppm). I would not mind as much in a cabin in the woods, but our house is tightly sealed with spray foam insulation, more for the summer months but I enjoy the wood stove (Jotl Oslo) so I am more concerned than I would be if I could see through the walls of a log cabin. I am not sure if I tend not to notice later in the season, or if there is something I should be worried about. I do not know what else to use to check other than a CO meter. I have checked everything else. Connections, stove seals, draft, everything. I have had a wood stove for over 17 years now, and I do not remember smelling smoke. And I have been vigilant since I have always installed the stoves myself. Just for sake of argument, My stove is externally vented with the properly sized pipe. And I do not smell the smoke in the main room where the stove is. Only the furthest rooms. Any ideas, or does anyone have a recommendation or reference I can contact?