I am still not quite sure what you mean. Can you elaborate on the author custom field?
I have done a few "test" guest posts and all of them post as pending articles under my name instead of the name that was entered under the YOUR NAME section of the guest post form. When I look at the different author options from dashboard, there is no way to tell who wrote (nor email contact) unless they were to put that in the body of the post.
Does it have to be edited in the plugin? Does it have anything to do with this coding from the plugin files?:
$new_post = array(
'post_title' => $title,
'post_content' => $story,
'post_category' => $category, // Usable for custom taxonomies too
'tags_input' => $tags,
'post_status' => 'pending', // Choose: publish, preview, future, draft, etc.
'post_type' => 'post', //'post',page' or use a custom post type if you want to
'post_author' => $authorid //Author ID
//save the new post
$pid = wp_insert_post($new_post);
/* Insert Form data into Custom Fields */
add_post_meta($pid, 'author', $author, true);
add_post_meta($pid, 'author-email', $email, true);
add_post_meta($pid, 'author-website', $site, true);