Pretty big program, QSliders won't work properly.

Hello,

I have a pretty big program, I'm not really not sure why these sliders are not working.

Source code: https://www.dropbox.com/s/b4bfole5iz...eator.zip?dl=0 (warning 1000 LOC, you also need to put the 'sprites' into where the program compiles)

Whenever I move one slider (change saturation), change tab, and move the other, it works fine. However, when I start putting another slider into the equation, the first one 'sticks' and refuses to go back to the right position. Now, I do realise that I should be posting small code samples of the problem, but I've tried isolating the problem, and it has not worked. For days now, I've been pulling my hair out, trying to fix the issue.

Again, I am sorry for just putting source code, but I have no idea where the problem is.

Thanks, Votato. :)