Sander's set is called McAulley'sFolley (near the bottom of the sets page) since that's what it's called in the files. There are no sets or items missing from the webpage files, although the cube recipes for DarbreakSoul charm are missing important details explained
here (I'll probably get around to updating the Webpage Maker in February).
Sorry for the confusion, I'd agree it's kinda dumb. I had no idea why some in-game names don't match the files so I just went with it. Along with the Animist ring "Life" ("Life-Taker" in the files) I don't think there's any other large exceptions among Sets (there are a few Uniques with name issues, like Bonesnap maul ("Bonesob" in the files), and skill names (a few are hard-coded and cause issues if changed, like Perfection ("Evade" in the files)).