darbs

I can't get my damage taken to consistently go up. I'll sit in front of a mob getting hit for massive damage for 5 minutes and my damage taken won't go up. I keep a close eye on it and I RARELY find a mob that makes my damage total go up. I know it's not lag because I'll check back on the badge status the next time I log in and it hasn't gone up. Is this a glitch? Has anyone else had this problem?