I wouldn't worry about that since that was determined over ten years ago. Plus, the way they were ranked would not necessarily be the way CGC ranked them.
Think of it this way. Even the 1/12 could have some very minor damage done to it over the past decaded and easily keep it out of the 9.8-10.0 range.
That said, remember that that CGC does it's best to grade a book, but it's not a scientific truth that a 9.8 is better than a 9.6.
Overstreet had to grade/rank 3500 books in a couple days (cue sympathetic violin music). He didn't have time to do that detailed of an analysis and couldn't even always stop to look at the back cover (i asked him about this). i think anyone would go numb at some point while trying to judge so many nearly perfect books.