[ext555]

when you say " context view " are you referring to one of the " built in " perspectives ? You can't change those .

I'm also confused because you mention putting a soft due date as the " start " date , but then you mention trying to group by " due " date in the view ..
I guess we need to know, what's in the due date column ? If it's blank ? OF will group those automatically to the bottom of the " due " sort .

The sort filters are referring specifically to a column in the view , and even though you might not be using that particular column as " intended " OF doesn't know that .