Achievements not updating/unlock

I created a world to do the caves and cliffs achievements in. However, when I do the achievement, the achievement does not update nor unlock when I reload the world, I attempted this multiple times and it still did not unlock, my friend did this on the same world and he got achievements even though I made sure we did the exact same thing. I attempted the achievements again in single player, but it still did not unlock.(Game does not tell me if achievements turned off.)