Moodle 1.9 beta
When I edit an entry for a past date, the post gets promoted to todays entry. That's not right, as the rest of the posts run chronologically. Editing a post should not change the date stamp and keep entries in their original post order.

So, we need to keep posts in their chronological positions, even when edited at a later point in time, unless we introduce a way to set a post date manually. This would be the ideal. Example

1- Default state: edit a post = no change in chronological position. It remains in true date order according to its original entry date and time.
2- Optional: Enter a new date and time to reposition the post manually to any chronological position.