@LillianLeahy no problem, thanks for your understanding.
@malone76 the custom function used to replace the read more text, but is now concatenated to the default read more text. This makes more sense though I'm not sure what caused the sudden change.
To fix it, you can remove the default read more text function like this:
remove_filter('the_excerpt', 'ct_tracks_excerpt_read_more_link');
Add that anywhere in your child theme's functions.php file and it will remove the default read more link.