Here's something I noticed about babysitters just today:
I was playing a single parent, and I had the camera follow the parent to work since I assumed that the babysitter would take care of the baby. However, as the hours rolled on, the baby's picture started turning red, indicating that it was being ignored. So I centered the camera on the baby to see what the problem was. The moment I did, the babysitter (who was just standing on the front porch) immediately sprang into action, changed the baby's diaper, fed it and started playing with it.
The next night, the same thing started happening. Again, the babysitter was standing on the front porch, but walked into the house to start caring for the baby the moment the camera settled on it. And this has happened pretty much every night that the adult sim had to work, well into the child's toddler years.
So I was wondering: where are your cameras pointed when your sim's babies are being ignored by babysitters? It happened so many times in a row, that I'm wondering if this is the trend.