how to see graphs for last week/month for perticular test ?snapshot report

hi, i have 2 problems.. 1)i want to see last month cpu utilization graph for the perticular host,how can i see that? 2)when i want to see snapshot report for say date 2dec09 7:30am,front pages(bb-html etc) shows time stamp of 2dec09 7:0am,but when i click to see status of perticular test of perticular host,it shows me status of 29oct09 12:40pm.how to overcome it?

-- Pankaj V. Dorlikar