I suggest you avoid using Insert | Page Numbers, which inserts page numbers
in a frame. Although the frame is set to Auto width, it doesn't seem to
expand to accommodate longer numbers. Instead, View | Header and Footer and
use the Insert Page Number button on the Header and Footer toolbar to insert
the number directly in the footer. For instructions on removing the existing
page numbers, see
http://word.mvps.org/FAQs/Formatting/UnaccountablyIndented.htm. For more on
headers and footers, see http://sbarnhill.mvps.org/WordFAQs/HeaderFooter.htm