Several times Devereaux touches on the order of events in the Seen world as it conforms to the Unseen, to make it as if it was always this way. Perhaps he's missed something subtle: the order of events in the Seen world literally does not matter, as time itself is not linear in Arda. It only seems that way to ordinary beings. Even then, as Tolkien writes more than once, the perceived passage of time varies. Notably when the fellowship leaves Lothlorien and Sam is trying to work out how long they'd been there, Legolas explains the passage of time varies, and Aragorn adds "In that land you lost your count. There time flowed swiftly by us, as for the Elves."