It's normal for a Samsung to have the white balance change, sometimes a lot, with different contrast settings. If you do a proper calibration you set contrast first and then don't touch it again. If you do, you have to redo everything else. Also, as you've seen it's not linear. There may be "jumps".I highly recommend that you break down Nothing beats knowing that your picture is accurate and without errors, and the benefit of a clean white balance is very obvious.