Unless I'm missing something, the Koufax and Aaron "re-lists" don't really appear to be re-lists; the cards in the scans for the auctions ended on the 27th are clearly different than the ones from the auctions that ended on the 20th. The auction descriptions are also slightly different. It's possible the seller had 2 high-grade copies of each card, and ran the auctions consecutively (at least that's what I would assume until seeing actual evidence to the contrary).