No more issues occurring. Turns out I just had so many different boosts on the Sim that he leveled like mad. But it was a feature, not a bug.
Thanks for your help!
@Casperight Could you try if repairing the game works ?
1. Close the game
2. Right-Click on the game in Origin
3. Hit Repair game.
Do you have any lot traits, traits or other stuff that could account for faster skilling?
Thank you for your response. I tried repairing the game. Still happening.
No lot traits, no.
But now that I think about it, this Sim has the following skill boosts: Top-Tier Toddler, Whiz Kid, and Llamacorn Scout. This could account for him gaining skills so fast. Although I remember my other Sims who have none of those traits also gaining skills incredibly fast, too.
@Casperight Top-Tier Toddler boosts ALL skills by 25%, Whiz Kid (If you mean the mentally gifted trait) boosts mental (so some) skills by 20%, and Llamacorn Scout's gives you another 25% boost to ALL skills. So, my dear, welcome to the world of creating a partial super sim! None of these are bugs. They are rewards for good parenting, something I applaud. Also, fair warning, the lot trait "Study Spot" will also boost all skill gaining by 25% so if you aren't into this incredible speed avoid that one.
Edit: You didn't mention it, and I don't know the exact percentage, but if you choose a knowledge aspiration and get quick learner will also boost their speed in learning things.
Edit 2: Oh I forgot there are traits you can pick from aspiration points such as morning sim, night owl, and savant. For others, with the tiny home pack, there are bonuses to the smaller homes that are off the charts, although that last one doesn't apply to you.
No more issues occurring. Turns out I just had so many different boosts on the Sim that he leveled like mad. But it was a feature, not a bug.
Thanks for your help!
