Yeah, things don't make much sense in canon, but what do we do about it? Eliezer has been fixing this continuity glitch by going through the things that could beat Harry's cloak and buffing them up, not (as he might have) by denying their powers over the cloak. (I think that there's a slogan in here somewhere, to the effect that only an Epic Item can beat an Epic Item, and Harry's cloak is Epic.) So Moody's eye must be the Eye of Vecna/Vance, and the Marauder's Map must be an invention of the Founders of Hogwarts (only lightly tweaked by the Marauders, assuming that this is the same group as in canon). So it goes right along with what Eliezer's been doing that the Map should see under Harry's cloak. The Four Founders are better than Death at finding people, after all.