There seems to be a new opf standard. If the metadata coding includes the following:
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns
pf="http://www.idpf.org/2007/opf" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
[...]
<dc:title>The Early Stories</dc:title>
<dc:creator id="creator">Truman Capote</dc:creator>
<meta property="role" refines="#creator" scheme="marc:relators">aut</meta>
<meta property="file-as" refines="#creator">Capote, Truman</meta>
<meta property="display-seq" refines="#creator">1</meta>
<meta property="role" refines="#creator" scheme="marc:relators">aui</meta>
<meta property="file-as" refines="#creator">Als, Hilton</meta>
<meta property="display-seq" refines="#creator">2</meta>
[...]
</metadat
The author appears, correctly, as Truman Capote, but the alphabetization (author sort) is by "Als", which means it appears far away from other Truman Capote books.
Personally, I dislike the new opf system. I prefer to put the author of an introduction as <contributor opf:role="aui", but that is not allowed in this new system.