[Theme Horse Support Team]

Hi kelsey,
We don’t have this category-archive.php page. I think you have customise the code. You have designed our theme this way so you need code customization for it.
To sort it alphabetically you need to pass an argument such as

$args = array( 'posts_per_page' => -1, 'orderby'=> 'title', 'order' => 'ASC' );

If you are unable then you may hire a developer to fix the issue.