Word 2003, large document using Outline Numbering.

I've read
http://www.shaunakelly.com/word/numbering/OutlineNumbering.html and
I've been really careful to follow the rules on Modifying Heading 1 in
order to modify others. At least I thought I had been.

Now, when I click on a Heading 1 paragraph, and choose Modify and then
choose Numbering, I get the Bullets and Numbering dialog box (Outline
Numbered Tab) with 4 out of the 8 boxes/options looking very similar
to how my outline numbering looks. And I don't recall the one that is
currently selected being the one I started out with (position-wise).

Can I just keep using the one that is currently selected and reset the
other three? Or am I in trouble now?

Thanks,
Keith