Either you or Word has inserted an Odd Page section break, the result of
which is a blank even page where required. If you didn't do this yourself,
then Word probably did it because you have led Word to believe you are
duplexing (by choosing mirror margins or "Different odd and even" headers)
and have started the next section with page 1 (or an odd number). Word knows
that odd pages are always verso, so it inserts an even page to keep the
pagination straight.
If pagination is not the issue, it may be that you have changed orientation.
Most printers don't like to print landscape in the first place, and they
especially don't like to be forced to print landscape on the back of
portrait or vice versa, so Word accommodates them by inserting a blank page.
You can sometimes change that by changing the section start type to "New
page" on the Layout tab of Page Setup.
For more, see
http://sbarnhill.mvps.org/WordFAQs/BlankPage.htm
--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
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