The Black Simmer

Hello everyone. I have recently discovered that I have a problem with gramssims hairs. I cannot seem to change color swatches between outfits which is very annoying. So for example, I put a gramssimshair on my sim in her everyday outfit category using the black swatch. Then I use another one of their hairs in the formal outfit category but I choose the red swatch. When going back to my everyday outfit, the hair has also turned red. I can't seem to use multiple gramssims hairs in different swatches on the same sim. I have tried it with almost all the gramssims hairs I have in my game and there's always this problem. Does anyone else have this issue or maybe have an idea how to fix it? Pls I need yall help 

Thank you xx