2 · What the router decides
The verdict updates the moment you have answered the first three questions.
Waiting
—
Answer questions 1 through 3 and the form resolves itself.
3 · Now choose the channel
The genre is what the document is. The channel is only how it travels — and it usually decides whether the document still exists in five years.
4 · Same facts, three openings
The routed form is expanded. Open the other two and read what the wrong form does to the first sentence.
Watch question 4. It never changes the form. It changes how much context you have to write down and which channel you are allowed to use.