I hope you're not using the plastic samples? I never use those things, I only use the color sticks (I do not use grout perfect anymore), only Colorclad, and you can have 89 colors available for them on site w/out having to order any colors, but why do that? Now I have 3 shelves of pints of multiple colors that no one will ever use, it's a waste.
Haven't had any peeling since changing to colorglad but I did have a couple malibu sands peel around the kitchen areas.