If you're going to criticize someone, try to actually know what you're talking about and aim it in the right direction. We do not import achievements without a list being official via xbox.com - Microsoft for whatever reason did not publish the Cabela achievements until today, at which point I pulled them over. The same issue is currently occurring with the game Blade Kitten, which has now been out a week.
As for NBA 2K11, same deal there. The achievements were first published on a sports blog called Operation Sports, at which time most sites began to repost them. We don't take a blog's word for it when it comes to achievements, so you won't see those on our site until Microsoft publishes them.