Sims "reset" after completing certain actions

I've started two separate games now. They both work perfectly at first. Then after a while they "reset" right after completing two actions which are (1) cooking a meal on the stove and (2) greeting sims off their home lot. They essentially complete the action, but right before the action finishes they "reset" making it so the action never happened. The food they cooked is gone, and the sim they greeted isn't added to their relationships. 

I attempted to fix this problem by completely deleting the game from my computer. I deleted all my save data as well. I recreated a new family, but the same issue started again after a while. 

I really want to play the sims 2, I would love to know if anyone knows a fix for these two bugs.