The most common cause of a new page appearing, is that the very last object at the bottom of the page is too large, or that an empty object is placed on the second page, for example an empty div, or simply a . Look at the Source view and scroll to the bottom, see if there’s anything there that might cause it. Make sure no code appears after the last line of contents that is valid and should appear.
The extra page could also be the result of the Duplex setting in the Sheet Configuration dialog of that section (choose: Section > Sheet Configuration). In that case the yellow Sheet bubble at the top of the page will state Back on the that second page.
