Fun with fire

A sim called taxi while another sim was cooking, leaving the food on stove which burned. Firetruck arrived right when all family left home. After several days spent on community lots, my family returned home with taxi and found the firefighter still at home going to extinguish the fire (this is normal in The Sims 2, the lot is saved when sims go to community lot, this cannot be done in The Sims 3).