Landscape pages in PDF are not uniform size -- Acrobat 7

[carpentn at genco.com]

My report volume is landscape.  The cover and title page are rotated pages.
Last year, I changed the page size from 7.5 by 9 to 8.5 by 11.  In Acrobat
5, the pdf generated fine (I used the distiller) and all the pages were 8.5
by 11.  This year, I upgraded to  Acrobat 7.  I use the Save As feature
because the distiller has disappeared.  The pdf pages now are randomly 7.5
by 9 and the right side of the text is cut off.  Can anyone tell me how to
correct this?

Nancy Carpenter
Lead Technical Writer
GENCO Distribution System
100 Papercraft Park
Pittsburgh, Pennsylvania 15238