Google has just made some changes in the search engine result page. The users are able to see multiple websites on the search page at one time from the same website. But now the google modified it now you are able to see only two listings of the same sites on the search result page.
The company also said that it will add more than two results from the same site when the search algorithm composes that the search is specifically relevant.
Google fetches the result from both domain and subdomain separately but the consideration is that Google will treat these subdomains as a part of the root domain.