Checked the TDM challenge for today. Same thing, Me: 0 People who haven't even played: all of my kills. I understand Treyarch/Activision/Who ever already made their money and don't care; however, there are so many things that need to be fix, and have needed to be fixed since day one. That "Double XP" people were suppose to get beccause of pre-ordering, didn't happen (atleast for anyone I have asked).
Check the emblem beside the name with the scores. There has been a problem already reported where Elite is linking the correct emblem and score to the wrong name. If you click on the emblem, I'm betting that you'll be taken to your own career page.
The Double XP event did happen as planned but the problem is that in game it only displays points towards scorestreaks. Not XP as it has in every CoD before this one. So people were getting it but didn't know it.