Multiple authors not showing in meta information

I need to display two author names on a collaborative post, but having some problems – as in, the post only displays one author in meta information. Does Publish Press Authors not support post meta information, or am I using an unsupported theme (Verbosa)?

I don’t want to use author blocks or show the authors after the post, just in the title where it shows the author(s), date and category.

The page I need help with: [log in to see the link]