Color slider not working

Spent a lot of time masking an image only to find I cant select red on the slider. I then tried on different images but its obvious it is not filtering through the correct colors. I am able to get blues and green but when I push the slider all the way to the left (red) it shows green.
Please correct this and I will edit my review but as it stands now this app is useless for me.

luna noire about Color Blast! - Photo Splash and Color Editing Effects