Achievements

I have been achievement-hunting for a while. I had every achievement except for playing the same family for 26 generations and 100 generations, as well as playing 10 different families for 10 generations. I then created a new family to play for 10 generations. But as soon as I made a new family, I lost all my achievements. I thought it was maybe a new-save thing, so I loaded my first family again, and my achievements were still gone. I don't know how to get them back, or why it happened.. but all that work.. gone