This might not be originally a Stylist problem, or it may not even still be a problem, I don't know. But I've changed this sim's clothes 3 times.

When I made this sim, Billy, of course CAS plopped him in a random outfit, and of course I changed it to something that I carefully chose to reflect the personality I built for him. I saved the game, etc. But when I deployed him, he was wearing the randomly-generated one. So I took Billy into Stylist and changed him out of the randomly generated one into a new outfit I generated just for him (since I couldn't remember the exact details of the one I had made before). Game was saved again.

Then when I started up the game again there he is in his stupid outfit again (it is really quite idiotic. It's a down jacket with hood and zipped tight neck, a pair of short shorts, and a pair of alligator shoes. Did I mention he's a teen?)

So I've taken him into Stylist again to change his outfit again.,.. and he came home in the clothes I put him in. The proof will be when I play again, I suppose.

Is this a thing that happens? A random outfit sticking and changes not sticking?

Outfit finally stuck. My most likely theory is that several times in a row, I somehow saved incorrectly, though it's hard to see how I managed to do it in Stylist.