The fact that I didn't post my question according to the guidelines is my bad. Sorry. But I did ask the question as clearly as possible.
So here goes:
1. File I'm trying to convert:
https://www.dropbox.com/s/t0n5o4k2rj...aryBarton.epub
2. Conversion log:
https://www.dropbox.com/s/tymzu3fblo...versionLog.txt
3. Output file:
https://www.dropbox.com/s/ztyvyq29e4...20Gaskell.azw3
4. Output file is missing the borders around text that are in the original epub file. No error message.
5. Only conversion option changed from default was at "Look & Feel" - checked "Disable font rescaling"
Hope this is clear enough.
Thank you!