It is just a kill count. Grabs/Caps don't mean anything on GameTracker.
Is it possible to implement caps/grabs as a stat for the software you're using, or is GameTracker not advanced enough for that? If it's possible, please implement it. If it's not possible, idk, maybe just keep it the way it is. Certain situations like these can be difficult because tracking kills only, just like ranking the in-game leaderboard based on kills, can be unhealthy for the minds of noobs. There is not enough glory in returning the flag, and just sitting in a comfortable place all day and shooting at passer-bys is a lot easier, and with this system, gives you more rewards. The result will surely be better and make gameplay experience more fun if capping is rewarded and kills is secondary to it.