I'm sure Barbara, or one of the LDW team will come up with a better explanation when they get online later, but from what I see here, there is nothing too strange going on.
People have been reported as disappering in a number of scenarios, especially when people are being buried. I assume Meka was one of these. Strangely, these disappearances (and babies being carried when mothers die) don't normally get reflected in by tombstones, so I can't explain this part. This disappearing problem is being addressed by LDW as we speak.
The fatal exceptions have also been reported, but I do not know what the progress is on these being fixed.
However, when a fatal exception occurs, you do go back to the last time a game was saved....and a game is saved only when you exit VS and re-enter. I haven't tested what happens here much, but know that villagers would probably age, due to the time between last saving, and playing currently
I'll leave it to the experts to fill in any holes here
Savi