It's happening with all hairstyles, men and women, and any colors I pick.
After I makeover a sim, the next time I see them they have the wrong hair color. It's hard to get a screen shot since I dont know when it's going to happen.
Making over NPCs are either triggering them to age (and that would take away all incentive to even buy makeovers) or there is a glitch changing hair colors on adult NPCs.
Here is one example of an NPC I made over the day before this photo, having hot pink hair. Next day, it's dark.
Other NPCs I have made over are blonde the next time I see them, when I have not chosen blonde.
