Borders are a paragraph formatting attribute. Like any other direct
formatting you apply it is carried forward to additional paragraphs when you
press the Enter key. After doing so go back to the Borders & Shading to turn
the attribute OFF.
Two ways to make your life simpler:
1- Avoid formatting on the fly [as you type the content]. Otherwise you're
in a constant ping pong match of "turn it on / turn it off" & make your
document far more complex than it needs to be. If you persist in using
direct formatting, type & edit your content first, then apply the formatting
where necessary,
2- Better yet, learn to use Styles for formatting rather than using direct
formatting in the first place.
HTH |:>)
Bob Jones
[MVP] Office:Mac