Exporting just a range of pages from an odt into a PDF creates a PDF with those
pages, which is fine. But the included bookmarks show all the chapters and
subchapters, even those that are not in the exported page range. When you click
on a non existing chapter in the bookmarks bar in a PDF viewer, you get
transported to the page that corresponds to that page, counting pages from page 1.
Example: exporting a document with 250 pages and 20 chapters and 50 subchapters,
exporting just pages 30-40. You get a 10-page PDF and bookmarks of all 20
chapters and 50 subchapters. Clicking a bookmark of chapter 1 (that starts at
page 9 in the original odt document) transports you to page 9 in the created
PDF, which is actually page 39.
The PDF should contain only bookmarks from the selected range of pages from the
original odt document.