If you are using one of those stupid wal-mart scales that tell you total body weight, BMI, Body fat and such then with all due respect you need to beat it with a hammer. Those are grossly inaccurate with a huge margin or error. Go get a body fat composition test done with calipers or do the actuall test where they immerse you in water or whatever. There is no way you could be 21% bf and weigh 221 at 6'4. That is grossly incorrect.