Hmm. Not sure entirely if this is an issue with my game or the career, but I thought I ought to mention it just in case- my sims keep reappearing when they're supposed to be at work- not coming home or whatever, more like one second they're not there, the next they are.
I've only tried it with one household, though, and I just installed a new EP, so it may not have anything to do with the career itself, but like I said, I thought you might want to know.