I am having the same issue but it only started recently. I can send my active Sim to other community lots and even Granite Falls, but when they go to work and I follow them (the Doctor's career requires you to play the "I'm a doctor for the day" mini game in order to advance their career) the Sims left at home who have work later in the day don't care for themselves when at work.
For me it's only happening when I go with my Sims to a community lot, then go home with the one that goes to work earlier and leave the one that goes later at a community lot.
There's definitively something going on but it looks like it's a bit different for everyone.
Thanks for your reports
