HELP I use 'roll back' then it has a big bug. the day don't move on to the next day. how can i fix it?

Error 1) Use rollback -> Pick up items. -> Go into the cave. -> The item you picked up disappears.

Error 2) Use rollback.-> The day is over. (Saved) -> Turn off the game. -> Turn on the game (enter the world.) -> The day before it was not saved.

Even after many days, if you turn the game off and turn it on, it return to the day you used rollback.

plz help.......... i want to play game......................