Our detectives are back with the following intel on this WordPress site
The site is using the One Page Love theme by Hit Delete .
We could identify 1 plugins (there might be more) - Better WordPress Google XML Sitemaps (support Sitemap Index, Multi-site and Google News)
A WordPress XML Sitemap plugin that comes with support for Sitemap Index, Multi-site and Google News sitemap. Image sitemap is supported, too.