My ACHIEVEMENTS don't save

I create a Survival world, i make a lot of ACHIEVEMENTS, i save and close my world, and the next day i played again in that world, and the ACHIEVEMENTS restart and I had to start again.
I think MAYBE it happen because i have the cheats activate, but i only use for weather, time set, gamerule and command blocks.
Explain me why is this happening, or is this a bug?
THANKS