I called Flow directly and they sent my parts that same day. You may want to try this avenue. Have you gone to a local shop to look at another pair of NX2's to see if everything is identical. Maybe like you said they threw the wrong ladders on yours but at least you can physically go and compare your bindings and another pair.
That is what I would do.
-I'm Slyder and I suffer from "Gummer Syndrome"