I just got my level 25 in team slayer. I lost my first game, and my bar went down to 0%. The next day, i played a team slayer game, and came in 2nd place and my team won. The funny thing is, even now, about 18 hours later, my bar still hasnt gone up. All of the other people's bar in my party went up a lot, but mine never moved. I dont really care about level, but i thought i would be a good guy and bring it to your attention.