Thank you for pointing that out, antropophageous anatidae...
Regarding corrections, I share Jellby's opinion. As long as the changes are easy to find, I have no problem with an altered epub file.
Regarding the dash, I think I'll just use another font for it. But I'm wondering if specifying AquilineTwo as a fallback font might do the trick? Now I'm the one picking nits, but I feel it is best to handle such an issue in the stylesheet if possible.