In the instructions for Atlas Map Markers, you tell the reader to open the "00000D74" node without telling them to expand the "0000003C" node so they can see it first. They only have "0000003C" selected at that point.
EDIT: Oh! And while I remember, I know it's very minor, but throughout the guide you have written "Copy as Overwrite into...", when in fact the TES5Edit dialogue says, "Copy as override into...".
EDIT2: Found another one: In the instructions for creating the AS-SkyTEST patch, you don't specify which mod's Worldspace entry you should be opening up.