I think Oleanna had to be considered to be a revival. It has been produced many times over the years and was made into a film. It has definitely "entered the popular repertoire," which is one of the ways that a show becomes a revival without having previously appeared on Broadway.
On the other hand, has After Miss Julie even been performed in the United States before? I guess they're equating After Miss Julie to a revival of Strindberg's Miss Julie, which doesn't make much sense to me. I can only imagine that this happened because Roundabout wanted it that way, but I don't know why it would have. As has been true for most recent years, the Play Revival competition is much stiffer than the Best Play competition, so I don't know how that category placement is beneficial to Roundabout.
"What was the name of that cheese that I like?"
"you can't run away forever...but there's nothing wrong with getting a good head start"
"well I hope and I pray, that maybe someday, you'll walk in the room with my heart"