Inncorrct Death count

Ok i`m not sure if this is how the game should work or if there is another glitch,

`im in alaska, my first game of the day i get ace with a 25/5 k/d ,i got into my next match late and had a K/D of 3/1,( now my daily total is 28/6),
my next game my sights are off as often happens lately, i left the room with a 0/3 K/D to change weapons in my bags, i hit the exit button to look at my total stats so far and i see it`s adding the 3 deaths to my total , now showing my daily total at 28/9 ,so i went back into the same game ,my score now 0/3 same as when i left the room ,at end of match my finish score was 9/5 ,i got 2 more deaths added for a total of 5 ,(the original 3 deaths are still showing in the finish total) my daily total is now 37/14, i was charged the same 3 deaths twice in the same match.NO WONDER MY K/D ISN`T GOING UP LIKE IT SHOULD, this can not be how this is supposed to work is it ?, so if this is a glitch about about a free stats reset card and some zp for the pain in my trouble. By the way why does my mouse sensitivity change from room to room and when i change servers ,sometimes i can`t get my gun sight to fix on target and go red ,i`m talking about stationary targets here ,whats going on there ?