post to in catergory to show up in preview format with read more button

Thanks for the Pastebin. Your file includes only one function to set up your child theme’s stylesheet. There isn’t any code relating to excerpts, so that’s the first thing I’d suggest double-checking before we go further.

Ah, I think I see the problem. This is the function you actually want:

function new_excerpt_more($more) {
       global $post;
	return '<a class="moretag" href="'. get_permalink($post->ID) . '"> Read More</a>';
}
add_filter('excerpt_more', 'new_excerpt_more');

The orignial one modifies the “Read more” link only when the link is already present, which isn’t the case here. Give it a try in your child theme and let me know if it does the trick.

Correct, copy and paste the code I provided into your child theme’s functions.php, below what’s already there.

Great, glad you’re set.