[MikeWV]

I tried changing the font setting to "Document Default" but it had no effect on the kepub.

Thanks for the suggestion, though.

Update #1:

I just tried it on Nook Android. That app disregards the embedded fonts when using the user's preferred font but it recognizes the embedded fonts when set to "Document Default." And for some reason, it centers the figure numbers (i.e., image captions) when set to "Document Default" but not when the reader's font is selected. The CSS I used is supposed to center the captions and it does in ADE and all the various Kobo methods I've tested.

Update #2:

I tried Nook PC today and everything works as it should plus it looks great!