New Samsung Gearfit 2 watch-Confused

LPC020409

I bought a gear fit new fitness watch a couple of days ago and am trying to figure it out. I thought I should adjust the app to allow negative calorie adjustments but when I do that, MFP adds my exercise calories to calories consumed and I get a negative number. As of now my watch tells me I've burned 2,875 calories so far today. I know that also includes BMR. I'm 5'1. 212# and 35 years old. I set my profile to sedentary even thought I get over 20,000 steps in day. I did this thinking it would add calories based on my activity but it's not.