Conversion to MOBI -- No Bolding

If I convert an ePub to MOBI using Calibre 3.15, then send the MOBI file to my Oasis 2, there is no option for bolding of the font (part of new enhanced typesetting).

If I convert an ePub using KindlePreviewer 3, then the bolding is available.

You can see more on this here:

http://www.kboards.com/index.php/topic,259636.0.html

The only way to reliably turn an ePub (From Overdrive) to a MOBI file with bolding is to do the following:

1. Download ePub
2. In Calibre, convert to AZW3
3. In Calibre, convert from AZW3 to ePub
4. Using the Kindle Previewer, convert the ePub to MOBI
5. Use SendToKindle to send the MOBI to my Oasis 2

Does anyone have a simpler way to accomplish this?

Thanks!