The Hogan record especially did kind of jump out at me.
I don't quibble too much about different equipment eras, but when a course undergoes significant changes it does seem to be an interesting point. But, then, it's up to the course. Some will be proud of changes they make and look at the course as an all new creation. Obviously a course like Oak Hill has a lot invested in their history and so prefers to consider that all is still essentially the same.