Site sets caching http headers four times

$ whead -nv http://www.demo.onehippo.com
HTTP/1.1 200 OK
Date: Thu, 10 Feb 2011 13:18:43 GMT
Server: Apache-Coyote/1.1
Expires: Wed, 10 Feb 2010 14:04:13 GMT
Expires: Wed, 10 Feb 2010 14:04:13 GMT
Expires: Wed, 10 Feb 2010 14:04:13 GMT
Expires: Wed, 10 Feb 2010 14:04:13 GMT
Pragma: no-cache
Pragma: no-cache
Pragma: no-cache
Pragma: no-cache
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Content-Type: text/html;charset=UTF-8
Set-Cookie: JSESSIONID=848FD126A0FEDB955BD43B27B138253E; Path=/; HttpOnly
Via: 1.0 www.demo.onehippo.com
Vary: Accept-Encoding
Connection: close
2011-02-10 14:18:41 URL:http://www.demo.onehippo.com/ [26508] -> "/dev/null" [1]