This is normal, the Tint control was a correction fix for the loss over lower bandwidth analog connections. It should not be necessary to adjust it on component or digital signal paths. The image passed in these forms should be balanced without any correction.
From Joe KAne's DVE:
"The picture quality you see on your set is going to be partially determined by the adjustment of the front panel controls, including Brightness, Contrast, Color, and probably Sharpness in the component input. The Tint control should not be active when using the component input but will be important if you use the S-Video or as last resort, the composite video input. "
