Aww, Karen, I am SO sorry this happened. I think I would try to wash it one more time, to see if it will fade evenly. I suppose it couldn't hurt. In fact, why don't you wash just the one, first, the purple, and see what happens.
The other thing you can do is take it all back where you bought it and ask for a refund since it all faded like that.
One other question--do you use powdered laundry detergent or liquid? Many time the powdered stuff just doesn't dissolve evenly, and can cause streaks. Just a thought.