Personality Points Glitchy?

So I'm just now getting back into playing The Sims 2 and I've been playing the Legacy iteration of the game instead of Ultimate Collection due to it being better optimized. I have noticed some differences between Ultimate Collection and Legacy and don't know if these are known problems, fixable or just how it is now.

One thing I noticed is the Personality Points being passed down from parent to child aren't lining up like they used it. You used to be able to see a child's Personality Points and trace them back to exactly which parent they got it from. For example if a child is very outgoing one of the parents must also be very outgoing as well and that's how the child inherited the Points. (sorry if I'm not explaining this well)

With that said I started a new family to which they had a baby girl. When she aged to a child I looked at her Personality Points and all but one aren't aligning with the parents. She has 1 point grouchy when neither parent is grouchy...they are both nice. The same goes for her other Personality Points. None align with her parents.

Child's Personality Points (the only thing that aligns is the Outgoing she inherited from her dad. Nothing else matches either parent)

Dad's Personality Points

Mom's Personality Points

This doesn't seem like how it used to be. Is this a Legacy thing? Another thing I noticed is the first born baby glitch is fixed in Legacy without needing additional mods or fixes. Could that be contributing to this?