Task in wrong date

Hello,

I have a task which have to be done today. When I look in the intelligent list "scheduled" the task is listed beneath the rider "Today". That is correct.

Now I decide to change the due date from the task is tomorrow, so I made a right click on the task and choose due date tomorrow. I expected that the task is now listed beneath the rider "Tomorrow" but it is still listed beneath the rider "Today". 

What is wrong?

In Wunderlist the same procedure works very well.

Hope anybody can help me. Thanx