We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.
I have created a document using Pages on my Mac and have exported a word document file to upload to Lulu. I made the lines with the Title of my book, the copyright, & the dedication as Header 1. Then I made the Chapter Titles Header 2. I do not have subtitles so I don't need to label anything Header 3. It seems pretty straightforward, but Lulu is still saying I do not have any chapter divisions. Help!