I was having alot of trouble editing my first Mindmeister map. I beleive the problem was that I was first trying to use the demo and editing that as my original Mindmeister map. So I had to go back to the drawing board and create a new map, then I was able to edit without any problems. So here is my new Mindmeister map that I am adding new notes to as I go along reading the Chapters.
http://www.mindmeister.com/41306214/technical-comm-in-the-21c