Incorrect Stats on Halo Channel (Mobile App)

I was discussing kill stats with a friend looking at the Halo Channel app and we both noticed that apparently all of our kill that were ‘headshots’. Obviously I know this is inaccurate.

See: Imgur: The magic of the Internet

If you add up all the individual categories it equals total kills, thus implying that there are no ‘normal’ (uncategorised) kills. But then it also implies that perfect kills don’t come under ‘headshots’. Basically, something seems very wrong with this stats screen.