ya as mentioned the lineup is fine... that thin plastic washer is a dust cap usually they go on the top of the bearing race to keep dirt and help keep water out. the smaller one should go on top of the whole works. it should have a rounded top part... you will most likely have to leave this one out because you are using a triple crown fork. you should also have a rubber wedge or a plastic wedge with this headset, that wedge holds your fork stiff in the bearings...
so like this top to bottom
-----top spacer (plastic)
----- wedge
-----upper bearing race
-----dust shield
-----bearings
-----upper bearing cup
-----lower bearing cup
-----bearings
-----lower bearing race
hopefully this helps and not complicate matters.