Ok. A couple of things. When it blows smoke, is it a constant smoke and when it does, is there an odor with it as well. If so, what does it smell like? There's the possibility of condensation sitting in the bottom of the heating/ a/c unit and when the a/c door opens, it's pulling the leftover condensation. And naturally, there would be a mildew like smell to go along with it. Or another possibility is that the car was in an accident, something wasn't sealed right. When it rains, water gets on top of the unit and drip in, and you see the results anytime the blower motor comes on (I've seen that happen before btw).

The second thing is this...... Why do you have your name and phone # posted up visibly where everyone can see it?