Hi guys,
Please check out this website and software:
http://www.anicesoft.com/
I think their EPUB convertor is essentially just using the Calibre conversion engine and they are selling their program for profit. They are listed on Google and software sites like
Softpedia
I think this should be investigated
The reason I found out is that I used it simply to test the PDF conversion and look what it comes out with in the metadata:
Anyway, I could be wrong, but I thought it would be worth raising awareness at least. Please excuse me if I made a mistake.