Has anyone noticed a servo acting way too mean?

I was playing around with my servos (I have three right now) and for a while i had one who I made mean and evil. But then I changed his traits to something more middle of the road, and he just kept on being mean. So I changed him to good since the whole house was up in arms and angry, added manners traits with cheats, etc, and he STILL acts like a jerk. I finally discovered that even though servos are young adults, he actually has hidden buffs that younger sims get when their emotional gauges (like empathy, manners, etc) fall into the red that make them act bad even more. So since he was bad before, he's going to keep acting bad no matter what his traits are. My other bots have a couple, some positive, some negative, too. Kind of think this is a glitch; in a way it's interesting for them to gain emotional tendencies, but it kind of defeats the purpose of being able to reprogram them. And not sure if they are supposed to get buffs aimed at kids and teens. Just curious if anyone else has noticed weird servo behavior.