Some organizations have a ton of subdomains, with different purposes.
When searching for something ETH related (https://ethz.ch/), the site-information is of some subdomain (https://www.quantumoptics.ethz.ch/). (The article here definitely has nothing to do with a Quantum Optics Group)

I would expect this to either show different information for each subdomain - or show show the same information on all subdomains (but not show the information for a.b.com for b.com results).