hmmm weirdness just happened.
Thornton had finished sculpting his first of his 5 stone sculptures. He'd tried twice previously but they shattered and became gems. This time, he had successfully sculpted a good socratic bust (I think it is called. I moved it off the sculpture station like I always do. I set him to sculpt another stone thing. Then I went to his skill journal. The counter for his stone sculptures was still at zero, rather than 1. I thought maybe it takes a short space of time to show up, so I returned in like 5 minutes, nope, still at 0. All of the other sculptures appear to be at their correct numbers, and all the painting stats for Cosette and Morganna and sculpting stats for Cosette are at their correct numbers as well.
Then I sent Morganna out on the town to consign items at consignment store (and also to refill her needs). When she got there, I noticed her needs hadn't been refilled, and I thought, I wonder why she didn't use the Motive Mobile (MM), none of the other adults were out. So I investigated their inventories, no MM there, and there wasn't any MM at home on the carpark space. I seem to have lost it. The MM belonged to Thornton. Morganna's collection helper and Cosette's moodlet manager are as per normal.
I'm about to restart Sims 3, I probably should take a break from it for a short while, anyway, and I'll see if that helps, but are there any suggestions?