Fast air never enters where you tell it too

[Weasel]

Ok, I am totally frustrated with assigning fast air entry points. I go into my the bombard menu and assign the jets to come in, lets say top left to bottom right. I then never touch the assignment and when the jets finally come in they come in from my side of the map which means they have a long flight and get knocked down.

Is there some frigging secret to getting those little bastards to come in the way you have assigned them too?