"Using Page-Break-Before formatting for the first paragraph on the following page is preferable to this."

If I return after a Heading 2 styled line Word defaults to Normal style. I then type the next Heading 2 line. I set my course in front of the line I just typed and insert a "Page Break". Word moves the new line to the next page and put a light blue line on the previous page. That line matches the Heading 2 Style I have set up. If I delete that line on the previous Page I lose the Heading 2 Style for the line I just typed. So I', not sure what you are talking about in the quoted line above.