I've been noticing when I add the macros for food items (protein/carbs/fat) and multiply by their respective caloric values (protein/carbs=4 cal., fat=9 cal) I am not getting the same total calories as listed on the packaging or even on calorie counting websites. What gives? What should I use for my actually daily calorie count - macros or total listed calories? Some things do add up correctly but many do not.