We set up this new public mirror ( http://centos.brisanet.com.br/) , but does not show in mirror list for our own servers for CentOS version 7, but it shows for version 5 and 6, also we notice that for version 7,  there is servers from another countries , like Chile and Puerto Rico.

I Read about the rand( ) thing on mirrorlist, but maybe there is some misconfiguration for Version 7 ? 

Here is my Test Output:

Version 7

Version 6

Version 5

Regards,