My options keep switching back to the original options

I think in 0.13.? And i know in all 0.14.~ and in all beta or alpha 0.15.0 i change my name and difficulty amd sensitivity and all that stuff in the options...but when i log in or go on minecraft after the 3rd time going on it goes back to the normal options with the name steve sensitivity lowered difficulty up and such...can you see if you can fix it because i tried to uninstall and the such and its getting really annoying