I can't turn anything off with the "NVIDIA Control Pannel". I can just change "Other applications control colour settings" to "use NVIDIA settings". I've the same, only that I use xy-subfilter instead of xy-vsfilter. Should I calibrate my monitor with madVR (when yes, how?) ?
Dunno, sorry. I guess just make sure you're actually using madVR because it really shouldn't render colours like that. I don't have any experience with xy-subfilter either so I can't help you there, but rendering at desktop res instead of video res will probably make the subs too sharp.