I have the same problem. When I look at "demolition master", it says 8/11 challenges complete but I have completed all 11. Now when I go to Elite and look under my career-challenges for game mode-demolition, it says that I am 8/11. And the worst part is the challenge progress for Elite is frozen. Stuck in the same place for "planted bombs". I have the same problem for "domination master" also. I suggest you go to Elite and see if your problem is the same. This thread has been brought up numerous times and hope Treyarch notices and will fix it in the next patch.
If you look on the iPad app under challenges/demolition there seems to be 13 challenges not 11 yet mine says I have completed 1 of 11 even though it shows 100% on 7 of the 13. I think this set of challenges must be screwed up somewhere along the line so if your out there 3arc please fix this. Many thanks.
This problem has occurred for many Xbox 360 users. It happened when the Leaderboards System for Demolition froze. So now i'm screwed out of Demolition Master until TREYARCH fixes the issue but who knows if they actually read any of these forums. It's so annoying. But if there's an issue with Elite or Domination registering info then that's another topic and another problem on TREYARCH'S table.
Mine is actually funny. I have all the Challenges done on the game but on Elite it says I need 50 plants BUT I have the 50 detonations. You would think in order to detonate I would need to...you know...PLANT THE FREAKING BOMB! Please TreyArch I'm not asking for much. Just get this fixed.
I had this calling card, and it's disappeared. I commented in one of these threads the other day, rejecting the idea that it was unlockable (because I distinctly remember unlocking it myself), and later checked by it online later that night to see that mine had indeed disappeared.