This is what I think:
Some background
----------------
Those lines were created by putting a table in the header / footer of the
document (so it appears as the background of all pages). It was originally
in the background of just the last page, which was defined as "Section 3".
Each section of a document can have its own header and footer (like you
might want different chapters of a book to have a different heading and page
numbering).
What may have happened
-----------------
You may have removed a section break which caused the "background" in the
header / footer of Section 3 to be copied to all the other sections.
What do do
-----------------
If you don't want ANY lines, go to View | Header & Footer, then select the
table by clicking the little plus sign at the top left, right-click and
select "Cut". Do that in each page that the lines appear where you don't
want them.
If you want the lines on the Notes page, then you will need to put in a
section break, and then customize the header and footer for each section
(you could copy that table from any section's header / footer to the new
Notes section).
Or, what seems easier to me, if you aren't comfortable with headers and
footers, remove the lines from all sections (via the View | Header and
Footer menu), then insert a table with borders around each cell and place it
exactly where you want it in the directory. Or leave the lines off
altogether, since some people have tiny handwriting and some people have
large handwriting!
For more on headers and footers, see this:
http://office.microsoft.com/training/training.aspx?AssetID=RC010216611033&pid=CR061958171033
http://word.mvps.org/faqs/formatting/NumberingFrontMatter.htm
For more on tables, see this:
http://word.mvps.org/faqs/tblsfldsfms/TableBasics.htm
Hope that helps.
