So, I created two sims in CAS and played them in Pleasantview until they had a baby.
I raised this baby to the point of teenager, and I somehow found the time to max his skills and get a girl to go steady with him.

Now, when in the neighbourhood menu, I selected the "Send Sims To College" thing and selected both the guy and his girlfriend.

They showed up in the Sims State University bin, but when I put them in an empty house, they stayed teenagers. I tried moving them out and putting them into a house with other college students, and they remained teenagers.

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Does anyone have a fix for this?
I was thinking I could move them back to Pleasantview and send them to college by phone, but I don't know how to move Sims from the University to the Town.

Has anyone had this problem, or know how to fix it?
The most important thing is to keep the skills and relationships.