I do find it very interesting that SGC on their very own grading explanation page of all the grades (well not all) lol refuses to list the "A" nor do they explain it. Not right in my opinion.
I've found cards that were clearly unaltered and maybe severely miscut that have gotten the "A" grade.
This is their incomplete grading page:
https://www.gosgc.com/card-grading/submissions
For all that SGC does well and correctly (and its alot of things), this is an area they have been lax in explaining.
mike