2 questions
 

1) I press "a" but it only shows the commanders in my most recent province.

Is there a way to view all of the commanders under my control?

2) I want to advance an army from my back lines to the front.
They need to cross 5 territories, all under my control.
But its seems I can only move them one turn at a time.
Is there a way to advance them each turn without doing this manually. ie, can I give an order to move to the province 6 provinces ahead, and have them advance each turn, without doing this manually?

Re: 2 questions
 

1) The closest way is to use the F1 nation overview.

2) No. :-(