Admins : strict chronological order PLEASE

I know there are settings to sort out the posts... I just want a simple, strictly CHRONOLOGICAL ORDER (new posts on top) but no matter what are my settings, the first posts shown are always from hours ago... If a new post shows up, once I refresh the page it vanishes and the "top" posts are from 5 to 9 hours ago... I just made a post myself a few minutes ago, it shows up posted in my profile, but it's nowhere to be seen otherwise... Can this be fixed...? Is there a way to IGNORE all those other settings ("relevance", "friends", whatever...) and have the post sorted exclusively by chronological order and NOTHING ELSE...??