the detailed and precise and totally informative post. You must be a spec writer? After reading once, I saw the entire problem in my minds eye and had no other questions. Very good verbal work.
Moisture, dry and wet air, and under the sole molding around the walls, did the installer leave a space for contraction and expansion. I am wondering if the wood flooring was put in under a bind or stress and the moisture made the wood do only one other thing, BOW.