I am not sure what happened and I do not remember what I was doing, but I do remember attempting to save on one of my savefiles. I alt-tabbed to check on something else, and when I came back, I noticed that savefile wasn't there. Confused, I assumed I hit the delete button by accident, and then attempted to create a new file. It was loading for a very short amount of time, and when it was done, the new savefile didn't appear. Irritated, I attempted to save over a throwaway file, but it deleted that too. I proceeded to quit and then reopen the game; the savefiles were still gone, but I could save again.
I am confused as to what could possibly caused it; does anyone have any idea? And if not, here's a weird new thing to be worried about.