have you added any functions or plugins to include the Modified (Updated date)? As this is being included and looks to be the order the posts are being displayed in
My apologies – I actually altered that one manually to see if changing the date would fix the issue.
The others that seem to be showing incorrectly haven’t been altered to their modified time is in line with the published date e.g. 2012 : http://prntscr.com/k8ufqf