total visits problem?

[GoogleCodeExporter]

my web is visible that last one visits, last week visits, last month visits, 
last year visits and total visits. But my total visits less than total last 
year. what's problem there. and that's my code:

$ga->requestReportData(ga_profile_id,array('hour'),array('pageviews','visits'),n
ull,null,date("Y-m-d"),date("Y-m-d"));
        foreach($ga->getResults() as $result):
                $oneHour = $result->getVisits();
        endforeach;

        $ga->requestReportData(ga_profile_id,array('browser'),array('pageviews','visits'),null,null,date("Y-m-d", strtotime("-1 weeks")),date("Y-m-d"));
        $lastWeek = $ga->getVisits();

        $ga->requestReportData(ga_profile_id,array('browser'),array('pageviews','visits'),null,null,date("Y-m-d", strtotime("-1 months")),date("Y-m-d"));
        $lastMonth = $ga->getVisits();

        $ga->requestReportData(ga_profile_id,array('browser'),array('pageviews','visits'),null,null,date("Y-m-d", strtotime("-1 years")),date("Y-m-d"));
//        foreach($ga->getResults() as $result){
//            echo $lastYear = $result->getVisits().'</br>';
//        }
        $lastYear = $ga->getVisits();

        $ga->requestReportData(ga_profile_id,array('browser'),array('pageviews','visits'));
//        foreach($ga->getResults() as $result){
//            echo $totalVisit = $result->getVisits().'</br>';
//        }
        $totalVisit = $ga->getVisits();

Original issue reported on code.google.com by camlinf...@gmail.com on 8 Nov 2011 at 2:40