Apologies for the wait, but unfortunately, there is no easy fix for getting epubs looking professional.
Smashwords Meatgrinder (I'm not joking, that's its official name!) conversion software does what it says:
chews the text. It's not just pretty-pretty either; I've seen bad conversions and it seriously affects the readability.
I'm not prepared to inflict that on backers or anyone who's paid good money for the book - you deserve a quality product and manual proofreading and editing the HTML source (after Calibre conversion, the best of SIX programs I tried) is the only way to get it.
The epub is coming, but to use the well worn phrase: it'll be done when it's done.
Cheers,
TJ.