The Preface is Marked as the
Cover Page 
The CC logo is marked as the
Cover Image

Both are an easy fix with The Calibre Editor.
In the Calibre Editor (T from the book list) In the file browser pane: Right click on cover.html (in the Text section) : Mark as Cover
Do the same for the file in the IMAGES section
Save
(Running debug, show 2 duplicate ID and a host of other possible (to some devices) issues. You can elect to have the editor repair all as you desire.