If the moisture caused this, then removing the moisture and drying things out would bring it back - we see this effect in our wood pantry doors in our kitchen when it gets very humid (we have AC only is basement and bedroom). When things dry up, the wood returns. Frankly, I don't think there is enough moisture in the drywall to do this - it generally takes very high humidity in an unconditioned room and also a few days. Very humid air has many gallons of water in it - your drywall probably only gave off a gallon of evaporated water. You had a large tree fall on this den right? That would certainly have an effect.
Door frames are tricky - but they can be straightened out.