Page numbers in headers are all the same number--help!

It sounds like you're just typing a number where the page number belongs. That will always show exactly what you typed. What you need there is a PAGE field, which updates to the correct number on each page.

Remove the typed number, leaving the cursor at that position, and press the Alt, Shift, and P keys together to insert a PAGE field.

Thanks.  In fact, I was *not* just typing in a number.  I selected the insert page number with the format I wanted, which properly put the text "Page 3 of 3" automatically in on the line it should have gone on.  It's just that it automatically said "Page 3 of 3" when it was on page *2* of 3.  I did try to manually correct the problem, but that didn't work.  I will try again using your suggestion.

Look at the status bar at the bottom of the Word window. (If it doesn't show the "page X of Y" there, right-click the status bar and click to put a check mark next to the "Page Number" entry in the menu.)

When the cursor is on page 2, does the status bar show page 2 like this?

If it says something else, what is that?

It's possible that the page numbering has been restarted, but I don't want to get you involved in looking for that if the cause is something else.