1)
Why does it say "Lech Ha'amed ha'Metzapeh"?
1.
Rashi (from Ta'anis 23a): In the future, one of your Talmidim will complain about My Midos - the length of the serenity of Bavel. Chabakuk drew a circle and stood inside, and said "Al Mishmarti E'emodah