I know this is a beta, but since I install OS 2 beta on my Apple Watch, the milage count/estimate is way off. I've walked outside to calibrate the watch, but a 4 mile walk on the treadmill stlll registers an 7.5 mile on the Apple watch. I've also notice that my usual 400 calorie workout on the treadmill has increased to 500 on the watch. Has anyone else noticed similar behavoir? Or a possible fix?