So then Page1 should be the only page and Page2 is printing for some unknown reason?
Try going into the section expert and checking suppress blank section.
It also may possibly be extra sections on the report (group footers, page footer, report footer) that can't fit on the first page and are forcing the second page to print to fit them. Try tightening up any sections or even suppressing them. Also, if Page2 is the last page of the report and you still need the page, go into the section expert, make sure the page header section is open, go into the suppress formula editor and type:
pagenumber=totalpagecount
That will suppress the header if it is flowing over to the last page of the report.