On client system it is showing policy serial number BA6D-10/13/2010 01:33:21 881 .
But date is still showing of 17 june 2010 r18
the policy date does not change;
if you want to get the latest date reflected; you can try modifying the policy;
once modifidied you will see the new date
http://www.symantec.com/business/support/index?page=content&id=TECH105907&locale=en_US
"But date is still showing of 17 june 2010 r18"---You mean it is updated up to 17 june only even though it is having latest policy? IF yes refer this article
Troubleshooting LiveUpdate Issues with Symantec Endpoint protection