Great question! This particular project has many parts to it and can be tricky.
When I first keyed this, I made a "cheat sheet" for examples of cover pages which helped a lot. I also reread the directions many, many times (and still do). Also went to the discussion tab at the top which was a huge help (and still do). It actually explains this project in more simple terms.
Hope this helps you and others. Fun project to key once you understand it!
Answer to your last question--yes, only key service place (and the date associated with that place) on the Muster In/Out card.