Attached in a 2009SP3 file of a small envelope I'm trying to produce with a 5 plane loft.  It should be readiy apparent looking at the three profile sketches and two guide curves what the shape is supposed to look like.  However, for some reason I cannot get Swx to follow the guides properly.  Instead of getting a uniform section through the model following the guides, it appears to be ingoring some control points and creating a model much larger.

Any ideas how I control this?