Saving LONG PDF docs in Acrobat

I was trying to save a 32-page PDF doc from an online site to my PC using Acrobat. It views and physically prints just fine, but when I tried to save it, it would save only about half a dozen pages. Same thing no matter what I did--change browsers, print to PDF, etc. I finally ended up physically printing it, then scanning it and saving the scanned file to PDF.

What was going on, and what do I need to do to fix this issue? Thanks in advance!