I feel bad for this guy...he should have posted here on hearth.com, because so far nobody on greenbuildingadvisor.com seems able to help him with his wood stove problem. I'm no expert but maybe his builder did a slammer install with his stove? No mention is made of a chimney liner.
http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/why-wood-stove-misbehaving
http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/why-wood-stove-misbehaving