Settings keep resetting in 1.0.6 1.0.7

When i open Minecraft, each time it starts with the sign into Xbox live screen. After this i have to go into setting and change to my preferred settings, every time i close the game the settings go back to default. Custom skins appear black, servers do not save and when i try to join a server the game crashes and closes. Then i have to fix settings again. This has been happening since 1.0.6 and was hoping for a fix in 1.0.7. I have completely uninstalled and reinstalled three times with no luck. Please help mojang