Ron, thanks a lot for the quick reply!
What you are suggesting was going to be my second step --- if what I have outlined above does not work and the mold keeps on growing and coming back. Since the roof is otherwise in a perfect shape, I was hoping to be able to keep it a few more years. Replacing the roof / plywood / insulation will be $10K+ (my estimate, not sure how accurate that is).

So you think I should go ahead and replace everything right now? I thought giving it a shot with some cleanup, installing a power fan and fixing what I think is the source of the problem (the baffles) might do the trick and costs < $1,000 instead of > %10,000. Not a good idea?