dois resultados diferentes no log do mesmo squid

pq acontece isso com o mesmo squid.conf em maquinas diferentes?

tail - f /var/log/squid/access.log

1º#####################################
1139937366.418 1150 192.168.0.0 TCP_MISS/200 5668 GET http://mail.google.com/mail/? - DIRECT/64.233.185.83 text/html
1139937369.992 926 192.168.0.0 TCP_MISS/200 487 GET http://mail.google.com/mail/? - DIRECT/64.233.185.19 text/plain
1139937370.341 1044 192.168.0.0 TCP_MISS/204 217 GET http://www.google.com/setgmail? - DIRECT/216.239.37.104 text/html
1139937370.778 677 192.168.0.0 TCP_MISS/304 402 GET http://mail.google.com/mail/? - DIRECT/64.233.185.83 text/html
1139937371.583 517 192.168.0.0 TCP_MISS/200 1898 GET http://mail.google.com/mail/? - DIRECT/64.233.185.83 text/html
1139937372.705 974 192.168.0.0 TCP_MISS/200 1159 GET http://mail.google.com/mail/? - DIRECT/64.233.185.19 text/plain


2º#######################################
192.168.0.0 - - [11/Feb/2006:21:50:20 -0300] "GET http://liveupdate.symantec.com/minitri.flg HTTP/1.0" 200 298 TCP_MISS:DIRECT [Accept: */*\r\nCache-Control: max-age=0\r\nUser-Agent: Symantec LiveUpdate\r\nHost: liveupdate.symantec.com\r\nProxy-Connection: Keep-Alive\r\nPragma: no-cache\r\n] [HTTP/1.0 200 OK\r\nServer: Sun-ONE-Web-Server/6.1\r\nContent-Length: 1\r\nContent-Type: text/plain\r\nLast-Modified: Fri, 29 Jul 2005 20:24:32 GMT\r\nAccept-Ranges: bytes\r\nDate: Sun, 12 Feb 2006 00:45:05 GMT\r\nConnection: keep-alive\r\n\r]
192.168.0.0 - - [11/Feb/2006:21:50:20 -0300] "GET http://liveupdate.symantec.com/automatic$20liveupdate_2.5.55_spanish_livetri.zip HTTP/1.0" 404 554 TCP_MISS:DIRECT [Accept: */*\r\nCache-Control: max-age=0\r\nUser-Agent: Symantec LiveUpdate\r\nHost: liveupdate.symantec.com\r\nProxy-Connection: Keep-Alive\r\nPragma: no-cache\r\n] [HTTP/1.0 404 Not Found\r\nServer: Sun-ONE-Web-Server/6.1\r\nContent-Length: 292\r\nContent-Type: text/html\r\nCache-Control: no-cache\r\nDate: Sun, 12 Feb 2006 00:45:06 GMT\r\nConnection: keep-alive\r\n\r]