Are you exporting to PDF (interactive) or PDF (Print)?
The former exports spreads by default, and you can only change that by script.
If you go to http://indesignsecrets.com/interactive-pdf-from-indesign-cs5-always-has-spreads-on.php you'll find a number of soultions, but the best is this one-line script from Harbs down in the comments:
app.interactivePDFExportPreferences.exportReaderSpreads = !app.interactivePDFExportPreferences.exportReaderSpreads
Thanks, Peter and Rik,
With your help it's working 90% correctly. I didn't notice at the bottom of the dialog where I'm asked for the file name to save as that it was defaulting to PDF (Interactive). Once I changed it to PDF (Print), I started seeing consistent 2-page spreads in Reader/Acrobat when I set Page Display to 2-page.
One small step to go. I'd like to see all odd-numbered pages on the right, as in a printed book (even though that means the first spread in Reader will have no page on the left). That behavior will put the page numbers at the outside edge and not near the gutter.
I've tried setting "Next Odd" in the Book Page Numbering Options dialog but, as expected, that made every chapter begin on an odd-numbered page. I just want the first indd to start on an odd page.
I've also tried toggling the Spreads checkbox and the Facing Pages checkbox, but changes there only make matters worse.
Bottom line: where can I tell InDesign (or Acrobat, if necessary) to always show page 1 and all odd-numbered pages on the right when Reader is in 2-page display mode?
If you are in 2 page view, turn on "show cover in 2 page view"
This puts the cover on its own page.
Alternatively, contrary to what I told you last time, you could turn ON spreads and then export as a normal PDF then turn off 2 page view. This should then have the cover on one page and the following spread as 2 pages in the window.
If you have any InD documents with odd numbers of pages, you might need to add in a blank page at the end to get the positioning correct for the rest fo the book. eg. If first InD file is 4 pages but second is 5, the 3rd file will start on the wrong side.