Google Site: operator was broken since 2005.

Some sites dynamically generated with some parameters or with some subdomains had a number of pages indexed in GOOGLE that was over billions but in fact those sites had thousands of pages. This error was reported several times and lately fixed by Google Team and  Googler Adam Lasnik .

Here try to read carefully the incident that calls for Adam and Google to pay more attention. How One Spammer Got BILLIONS of Pages into Google in 3 Weeks