I own the Fitbit Force, and wanted to know if I were to wear it while running, elliptical or stairclimber does it convert the miles/floors to calories burnt? If I were to also use runkeeper are the miles/calories double counted? Also, If I manually enter in an activity and wear the Fitbit does it also double count the calories. Just wanting to see if I should wear my fitbit while on the elliptical or other activities and just manually enter in data. Thanx!