[joelande]

At first I thought, me too...if you have a bunch of actions that each have a due date, doesn't it make sense to sort them by due date.

But then I thought, well that assumes that they all have an equal duration, and they all are started sequentially in the same order (or some other mathematically-correct variant of duration and start dates).

But, then again the clincher is that you specifically asked OmniFocus to sort by Due date, which implies ignore the start date or the order you may have manually dragged your actions.

(Lets assume that projects will sort first.)

So then the question becomes, do we want task due dates within a project to sort too?

I guess it depends:
a) when the View ribbon is not sorting by due dates, tasks should revert to their manual position within projects
b) certainly in Context mode that makes sense