Thank you darry for your reply and clarifications.
What about having multiple variants/formats of the same author
(dc.contributor.author) names but all linked to the same authority key.
Example can be seen below. Even though this author is the same one, this
shows as if they are different
My understanding is that each field under authority control is considered
unique and distinct from the others, and will therefore be given different
authority control IDs. As far as I know (and I think this holds for DSpace
7.6 as well as 6.x) there is no way to share the authority control