This issue is the same as reported for OOo (Issue 116085).
PDF exporting of a range of pages contains the bookmarks of the entire document.
The attached document was made from the document provided in Bug 31606 (https://bugs.freedesktop.org/show_bug.cgi?id=31606) and exporting pages 30 to 40.
Note: Bug 31606 can also be confirmed by this attachment.
Created attachment 41604 [details]
PDF export of AndrewMacro document
Just to report that the latest RC3 has this issue solved.
Verified by the reporter - Closed - Sophie