First: go to File Page Setup and look at the Layout tab. By the sounds of
it you have 'Different first page' checked. Thus the header you add for the
first page of section 3 does not appear on the subsequent pages of section
3, but does appear as the first page of other sections. When you select the
header, the display shows you where you a 'First page header - section 3'
etc.

Second: on the Headers and Footers toolbar there is a 'Same as previous'
button. You currently have this selected, at least for the First Page
header. This means that any change you make applies to previous section(s)
also; and if you were to change the header in the preceding section, the
following section is also changed. Clearing that button breaks the chain at
that point in the document.



"Sharon" wrote in message
...
I have created a fairly simple document with about 6 sections. When I add
text to the header of the first page of section 3, two things happen. The
text is NOT repeated on the subsequent pages of section 3 (despite the
fact
that the header DOES say section 3, and it also says "previous"), so I
have
to write it in again. However, when I do that, the text then appears not
only
in the rest of section 3 but also some - not all - pages of section 1 -
notably the table of contents and a couple of others!! WHY??????????