I have an observation and then a question-
In Calibre:
1) Import EPUB>Convert to AZW3 (strip original font and embed preferred font)>Hyphenate.
If I convert this AZW3 to DUAL MOBI and then email to my PW2, I get a cover but no embedded font or hyphenations.
2) Import EPUB>Hyphenate>Convert to DUAL MOBI (strip original font and embed preferred font).
If I email this MOBI to my PW2, I get no cover but hyphenations and embedded font works.
If a DUAL MOBI is just a MOBI with a KF8 included inside, why do I get a different result between creating a DUAL MOBI from a hyphenated EPUB vs a DUAL MOBI created by an AZW3 (hyphenated and embedded) that was created from that same EPUB??
All ideas or explanations gratefully appreciated!