I've recently added the Co-Authors Plus plugin and while it allows me to select multiple authors for each post, only one shows up in the actual post.
After reading related forums, this is most likely because the template tags were not added/not added correctly. However, I can't find anything related to "the_author" to edit.
I'm currently using a Streamline Child Theme 1.0.1 by StudioPress. Is this even compatible with this plugin?