Mods not working

I have downloaded a good 20 mods, all working good all in the right place however when i open the game and create a sim and place these hairstyles on the sim, they just have a old head, some work, some don't. Also some look the same as they should in the create a sims but when you go to play the sim, the colour has totally changed and looks weird. 

Is this just because the person who has created the hairstyle has missed something out, or like there's an error somewhere