My saved process was gone.....

[ChopSuey]

I'm playing rune factory 3 about 3 weeks, i used to save my process from the game but i dont usually use the quick save stuff from the emulator and while i was playing the game i received a phone call an i reject it because i want to save my process first so that i can resume again...i save the game from rune factory and after i saved it i got the same phone call again and i answered it ..... after we talked my drastic has stopped i launched it again and try to continue my process but it was not the same anymore ........ how can this occur how to prevent from happening again..... plizzz help me out