1. High pressure rinse for about 5 minutes.
2. Soaped her up pretty damn good.
3. Let it sit for a minute or two.
4. High pressure rinse for another 5 minutes.
5. CA blade to dry the car.
6. Salt stains appeared by the wheels and lower portion of the car in certain areas.

A second washing took care of everything, but where did I go wrong the first time around?

 

I doubt you did anything wrong other then miss some spots or it took more soaking and rubbing to remove it.