bad thing is, for headshots, its counting actual headshots....not headshot kills...so you cant really tell how many you have ....as for the explosive and such ones, i dont think there is a counter for that, you will just have to look at each gun and add it up .... multimines, rockets, FAL grenades, noob dragon, uzi....ummm.. i think thats it....and the last 3 will have bullet kills and explosive kills together, so pretty difficult to gage.
my stats seem really fucked up too =/ ...i know i was getting REALLY close to 100 headshot kills before the whole live stat deletion thing...then we got stats back, ive played lots more online, and still dont have it =/ wtf i say !