Thanks for noting that, Jane.
Same thing is true for Plenty: Even though a substantial number of U.S. enthusiasts, too impatient to wait for US publication, did order from the UK, it's difficult to believe that the current EYB bookshelf breakdown reflects the actual editions owned.
Early on, when more EYB entries lacked cover images, I'd often list a different edition than I owned just in order to have the image. Now it's rare for there not to be an accurate cover.