by blow code
#set($results = $core_v2_searchResult.List("%{ Query = 'type:forum', Sort='date desc'})
#foreach($result in $results)
{
$core_v2_forumThread.Get($result.GuidId).LatestPostDate
}
LatestPostDate is not coming is descending order , ideally it should be came in descending order because we have applied sorting as date desc.
its giving LatestPostDate is random order.