[FIXED] Active Sims interrupt current interaction to do something else

I am having the same problem. My toddlers are hungry and their parents won't complete cooking a meal. Instead they just go do something else, like play with a lump of clay, or anything other than cook. When I finally do get a meal cooked, the hungry toddlers won't eat enough. I had to use a cheat or else the toddlers would have been taken away.
I also get random sims coming into the house, start to fix a white cake, then leaving the cutting board to go start another white cake. I wind up with cutting boards of partly started white cake everywhere.