What you want is a different header for each section.
To do this:
1) Create a section break at the end of the content page
2) Go to the header of the second section (page 3). Click on the 'Link to Previous' button in the Navigation section of Header & Footer tab. The 'Same as Previous' indicator on the right of the header should disappear.

Now the headers are not linked and you can have a different header in each section.

Cheers,
Andrew