1. That still changes the past, and I can prove it with one word, Alice. To explain more, Gothel's interactions with Nook, as well as Alice as a whole, would not have existed in the timeline pre the creation of the WR, adding Nook into the events to produce a brand new person and interact with another changes the past, therefore this spell changed the past, which means that it broke a law of magic, making it impossible.
2. Considering we aren't actually including any of this in the page, all that's included is the heading, which is a very minor bit of information, all we need to say is that following the creation of the WR "X" happened, we aren't including all the weird time stuff thats more theory, all we write is what happened and that it happened during and preceding Nook's first appearance in 611.