请问，为什么我的squid access.log记录是重复的

1304052228.933 617 192.168.8.252 TCP_MISS/302 803 GET http://www.microsoft.com/isapi/redir.dll? - DIRECT/65.55.21.250 text/html
1304052228.933 617 192.168.8.252 TCP_MISS/302 803 GET http://www.microsoft.com/isapi/redir.dll? - DIRECT/65.55.21.250 text/html
1304052229.758 795 192.168.8.252 TCP_MISS/302 642 GET http://go.microsoft.com/fwlink/? - DIRECT/65.55.57.251 text/html
1304052229.758 795 192.168.8.252 TCP_MISS/302 642 GET http://go.microsoft.com/fwlink/? - DIRECT/65.55.57.251 text/html
1304052230.227 425 192.168.8.252 TCP_MISS/200 32928 GET http://tw.msn.com/? - DIRECT/207.46.59.170 text/html
1304052230.227 425 192.168.8.252 TCP_MISS/200 32928 GET http://tw.msn.com/? - DIRECT/207.46.59.170 text/html
1304052234.883 172 192.168.8.252 TCP_MISS/200 565 GET ? - DIRECT/207.46.68.50 image/gif
1304052234.883 172 192.168.8.252 TCP_MISS/200 565 GET ? - DIRECT/207.46.68.50 image/gif