This is how they made the "save as PDF" function work in Word 2008.
Word creates on PDF file for each section in the document. I don't know
why they did this. Probably caused by the license agreements beween
Microsoft, Apple, and Adobe. Or they were just being ornery. I don't know.
On the Mac, you can use Preview to collect these PDFs into one PDF. See
http://www.macworld.com/article/143023/2009/09/combine_pdf_snow_leopard.html
I'm fortunate enough to also have Word 2007 for Windows. I do my
writing with Word 2008, then use Word 2007 to create the PDFs for those
more complex documents that have multiple sections.
--rms
www.rmschneider.com