Degreeing a Cam vs. Lining Up the Dots
I don't know.
"Not knowing" nor "not seeing" what you know and see, all we do is guess
My advice
There is simply TONS of "how to" on the internet. Most of the major cam makers have downloadable "how to's" on degreeing a cam, and there are vids on YouTube and other sites
It might be possible the cam is ground wrong. It might be possible the cam sprockets are mis-marked
It might be possible there are cumulative errors in both the cam drive and the cam
AND........
It might be possible you are making a mistake somehow.