I noticed that too SkinnedSheep -
By enthroning his Son as the Messianic King, Jehovah had, indeed, become King in a new sense!
I can only think that they are up to their normal tricks by just throwing in a statement that will totally confuse the sheepies, that way you distract them from thinking deeply about the rest of message. Also, if you don't really believe that Jesus became King in 1914 then you could just consider that in some sense he did.
Or someone is trying to introduce the idea of the trinity.