Regarding the messages with the fonts. That is actually an issue with ePUB export from CS. I believe there is some font option while exporting (I don't use CS myself). What it is basically saying is that those fonts are mentioned but not in the the ePUB. Check the CSS file in the ePUB, I think you will see the references there.
There are certain metadata elements which are required. The <date> one is actually easy solvable. Open the ePUB in Sigil and save. That should solve that one.
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