Hey @Mathieu_D,
Thank you for reaching out to us with your question. We can totally understand your desire to have your hard work reflected in the credits for albums you’ve had a hand in creating.
One thing to note here is that changes that you make individually to Roon album credits aren’t reported back to metadata providers. They simply allow you to groom your collection and content so that you can access and interact with it more to your individual preferences.
You can however, submit corrections to album credits in Allmusic and edit information in MusicBrainz as well as Discogs. Those corrections could filter out into the data used by metadata providers and correct some of the uneven crediting you seen on these titles.
I hope this helps you on your way to successfully updating some of the recording you’ve participated in. 