I think it's normal. From the guide:Here's some screenshots. As you can see, when I change the chroma setting, it's not giving me the same setting in the OSD.
algorithm quality <-- chroma
chroma quality determines how the chroma layer (CbCr) will be doubled to match the luma layer (Y). This is different from chroma upsampling that is performed on all videos.
The chroma layer is inherently soft and lacks fine detail making chroma doubling overkill or unnecessary in most cases. Bicubic60 + AR provides the best bang for the buck here. It saves resources for luma doubling while still providing acceptable chroma quality. Adjust chroma quality last.
let madVR decide: Bicubic60 + AR unless using NGU very high. In that case, NGU medium is used.
normal: Bicubic60 + AR
high: NGU low
very high: NGU medium