I was starting a new game today, and I created a family with twin toddlers in CAS. When I started the game, however, I noticed that one toddler was a day older than the other!
The glitch didn't affect any of my other sims, but I've had it happen before -- Twice, my YA sims were two days old when I started the game, assuming that they're supposed to start out on the first day of their life stage.
I have a clean game; no mods or CC, and I'm all patched up to the most recent patch.
Thank you in advance for helping!