Nah, opacity is 100% and different layer still has the same issue.
Different files are fine. It doesnt seem to recognize variations in some shades either. Like i have to jump up 10 or more points on RGBHSV for it to be recognized. And its not just me, it the exact same shade until a big enough jump is made.
Edit* Ok so i seem to be limited to using only the colors that were originally used in the image. Its to do with the color map, but how do i disable that? Or do i have to work with it?