is something wrong re burn meter?

i keep my activity set at sedentary and just add in my workout. so i set aatvity level at sedentary ;the burn  estimate is 1520,(top number)  and then when i added my workout of 215 cals burned and the burn estimate added up to 1690 , 1520 + 215 is 1735 yes? or is there something i am not understanding.?

It subtracts the sedentary burn for that half hour or hour that you would have burned, but didn't, so it doesn't double count your time.

thanks