[HSY] Hair grows even though it's disabled

I'm playing on PC with a brand new vanilla save where no mods or CC have ever been installed.  It is a save I started about a week ago after getting Enchanted By Nature.  My household has 3 adult sims; 2 females and a male all of which I made myself. 

The females don't have any body hair selected but the game keeps adding leg and arm hair randomly.  I've lost count the number of times I've had to go back in to CAS to reset the hair to none for them as the 'shave' option has suddenly appeared while they are showering

For the male I have facial, arm, leg and chest hair on, but no regrowth selected or back hair.  However at least once he has randomly grown back hair and I've had to reset that.