AZW ebook is not displayed correctly

[Kurt]

Calibre Version: 2.70
Operating system: Windows 10

1. I "purchased" the free preview of "Collins Spanish - English Dictionary" on Amazon and downloaded it to my Kindle Viewer on Windows. The book displayed fine in the Kindle Viewer. It was stored as a azw file on my computer.
2. I imported the azw file into Calibre 2.70 and opened it in calibre. Apparently it is not drm protected. However, Calibre only displayed two pages: page1 is a strange gray scale, page2 is blank.

I double checked that I use the correct azw file (the one that is displayed correctly in Kindle Viewer).
I attach the azw file along with a mbpV2 file that was stored along with it.

Calibre debug output:

T:\>calibre-debug -g
calibre 2.70 embedded-python: True is64bit: False
Windows-8-6.2.9200 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '8', '6.2.9200')
Python 2.7.9
Windows: ('8', '6.2.9200', '', 'Multiprocessor Free')
Qt: Untested Windows version 10.0 detected!
devicePixelRatio: 1.0
logicalDpi: 96.0 x 96.0
physicalDpi: 90.0253164557 x 89.797979798
Starting up...
Started up in 2.78 seconds with 34 books
stdout+stderr from file dialog helper: ['', '']
piped data from file dialog helper: ['\x18\x8e\xff\xfcKM\xc3\x0bC\x13\x07\xb3\xe2R\x9f\xca\x03a\xd2\x98\x16\xc8\xde_/\xb73\x96#\xcf\xd69', 'T:\\B008LQ9NLC_EBSP.azw']
Added Collins Unabridged Spanish to English (One Way)Dictionary (Collins Complete and Unabridged) (Spanish Edition) to db in: 0.2
Added 1 books in 0.6 seconds
Worker Launch took: 0.171999931335

[Kovid Goyal (kovid)]

calibre does not support dictionaries -- they use special internal
markup,that is different from non-dictionary books.

 status wontfix