I've been having this issue too. Found someone recommending using a basic watchface without the floor count and steps showing on the face. I'm doing that now and it seems to have accurate info on the health app on both phone and watch. Worth trying. ..
I'm afraid we won't find an answer here on that problem. No one from Samsung will officially post on it here because it's a US community and they could care less. The "official" people that post here are pretty useless on anything but the basics they can Google and then quote back to us.