Mine does the same thing. Logs 300 steps before I've gotten out of bed. Logs an hour of sleep while I'm reading on the couch. Doesn't log stairs at all. I returned one, figuring I got a lemon. The second one does the same things. I am super disappointed with this watch.
mine also counts tottaly wrong like triple of my daily steps or even more! now i don't even trust the heart monitor!
I reported through S Health the issue and they recomended to try the sensor in test mode and it worked fine also they asked to remove the application and to install again which i did already but seems the issue still the same!
This is my 2nd watch and it came with the latest firmware for GW i didn't update or anything!
Also, I have a quetsion if we are going to get the latest IU 5 for active 2 or not ?