This might take an EPUB expert and requesting a moderator to move this thread to the EPUB forum, but to start, please post the contents of 9782226492364.opf in a spoiler or at least lines 22, 23, 24, and 25. (and inspect characters 47 and 48 in those lines.
(EPUB files are actually zip files, so you can get 9782226492364.opf by unzipping the epub. If you are using crippled tools and/or a crippled OS, you might have to rename it as 9782226492364.zip first.)
Also have a look at toc.ncx
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