If you can only see one page when previewing music (and you know that the piece has more than one page) it is likely that Javascript is not enabled in your browser, or not working properly.
To check to see if your browser is running Javascript, or to find out how to re-enable it, please try this site: www.enable-javascript.com
Whether or not you can see all the pages of music in the preview, this does not have any correlation to being able to print the music, as it is available after purchase as a PDF file.
