Okay everyone, I can't word what I'm experiencing correctly. I don't know how to ask google correctly, and I have some major art deadlines coming up. I REALLY need some help.
I can't post pictures, because of the forum rules, but here's my problem: I use a color, any color. However, when I pick up my pen tool and "mark over" the areas that have previously been colored on, the color darkens. I have checked everything out that I know of, but I don't know what's going on.