I can only report on what my experience was, on the day.
I have a fairly mild lens for my right eye, so perhaps that’s why I didn’t notice the problem that Bob Beech did.
I didn’t drive in the dark, but the mirrorcam did cope well with bright sunshine and contrasting dark shadows. It’s meant to compensate for ambient light levels…perhaps there’s something wrong with the op’s right-hand camera.
Screens are funny things…when I first had an Amstrad computer plonked on my desk it gave me such a headache I considered resigning from the job. Then, I got used to it.