I'm getting geared up to re-roof next weekend, and I think I've got everything covered. The only loose end I have is does the drip edge go over or under the ice & water shield. I can see reasoning behind either, but I figure this is a good place for confirmation.

I had a new roof installed 15 months ago. Because I switched to a ridge vent, I blocked my 2 attic gable vents with plywood nailed up over the vents from the inside. The 2 pieces of plywood are now covered in spots of black/grey mold. Any ideas on what could be causing this? - plywood not airtight (do I need to caulk around it)? - use painted outdoor wood? - put housewrap on the outside side of the plywood? - plywood already contaminated? I don't think it's a general attic moisture/vent problem, because there are no other signs of mold or moisture on the roof sheathing or trusses, or any wood in the attic. Only the plywood blocking the vents. Both bathrooms and the kitchen fans are vented up through roof vents and were replaced when I replaced the roof. My roofer swears I have enough soffit vents for adequate ventilation. Should I drill out some more soffit vents, anyway? Thanks!