Apple Watch is miscounting flights of stairs
Saw this topic on a different chain with no resolution. Talked to some Apple Watch engineers and they suggested 1)locking the water (swipe up and hit the water drop), 2) washing the watch with alcohol or soap/water 3) flush the water out per the instructions - pull on crown.
It worked! It's been miscounting flights of stairs for two months and AppleCare told me the barometer was broken and I needed a new watch.
Voila! Problem fixed.
Apple Watch