If you are actually using Publisher, that is the newsgroup for this question,
but if you take a look at the Status Bar (bottom of window) you should see 4
page icons labeled 1, 2, 3, & 4. If there are _not_ 4 icons, go to
Insert>Page to insert the additional page.
If there _are_ 4 icons, pages 2 & 3 are connected to each other as the
inside pages, referred to as a Spread. The result is that when you click
_either_ 2 or 3, you are actually selecting _both_ which are presented side
by side in the window. If you can't see both pages at once, change your Zoom
setting to 'Whole Page'.
HTH |:>)