Thread:Project:Support desk/Categories that exist are showing up as Red links

On my breadcrumbs extension page you can see that some of links at the bottom of the page are showing up as Red links: www[dot]diyautowiki[dot]com/index.php/MediaWiki:Breadcrumbs

However when you click "Audi A3 and S3 and RS3" you can see that the category page does in fact exist.

Anyone know why this might be happening? Thank you in advance for any help.