I did quit the game in both instances. That is what I do. I press the spacebar to pause the game, go into the menu, select Quit and exit the game. I shut my computer completely off at night, I do not leave it running all the time. The situation happened again today. Both versions. The pregnant females had had their babies, and some of my children had aged as if the game had continued to be played. Don't know what the problem is.