So people were having an issue with family trees not displaying a father, and it's now happening to my family. It's not just a display error, either - the game doesn't recognize them as family at all, which has led to a sim autonomously hitting on her father. The thing is, the first child born to the family founder does display properly, but his sisters don't. I also think he's spawned on his own, but the family tree isn't showing it.

I seem to be experiencing a bug - when a sim transitions to teen, they don't get their fourth trait. It says on the pop-up that they do, but it doesn't display the trait on their simology panel and they don't seem to show any signs of it. 

Provided you get a cracked exe before you play the game for the first time, SecuROM should not be installed on your computer.

Vampires, I'm guessing, judging by the cape comment.