I have written a quite extensive post on a similar subject that you can read herehere. Also take your time and read all linked posts.
In there I have explained why you should not be using query_posts
and why you should not use custom queries in place of the main query
A few things here:
Remember to create a child theme, do not make changes to a theme that you have not written. You will loose all your work if you update that theme
It is real easy to create your own author archive page. Simply make a copy of your
index.php
and rename itauthor.php
. It is that easyUse
pre_get_posts
to make changes to your author page. Do not make changes directly through a custom query on your author page. You can use the following in your functions.phpfunction wpse166864_include_category( $query ) { if ( !is_admin() && $query->is_author() && $query->is_main_query() ) { $query->set( 'cat', '1' ); } } add_action( 'pre_get_posts', 'wpse166864_include_category' );