My wife and I both have the Galaxy Fit2 watches. When we go on walks, mine records the calories burned accurately while her's doesn't. After a 2 mile walk, mine will say something like 230 calories burned while her's says 65 calories burned. I've gone through the settings and both are set identical to each other, and our Samsung Health apps are both accurately setup for us (height, weight, age and activity levels). I don't know why her's doesn't record properly even though it does read the heart rate and everything fine. We've tried recording the workout through the watch and even tried on her phone through the app, but still nothing seems to work. Any ideas on what is causing this?