That's one of the bugs that we've still got from the website upgrade a while ago. We're considering removing that link altogether and just linking directly to the changelog. That's where that info comes from anyway.

To access the raw changelog; on the appliance page, click "Manifest & Sigs" link (far right of the download links). Look for the changelog file. E.g. for v14.2 WordPress: turnkey-wordpress-14.2-jessie-amd64.changelog.

Or the source file on GitHub: https://github.com/turnkeylinux-apps/wordpress/blob/master/changelog