Is there a reason everytime I replay my own demos, whenever I had hit tab during a match, nothing shows up on the demo? There's just an empty gray box where all the player names, scores, etc. should be. I occasionally get team colors mixed up as well, so in the top right corner when someone is killed, for example it shows a T killing another T, when it was actually a CT killing a T.

That usually happens to me in the begining of the match, but when I switch veiws or players it usually clears it up....