Grasshopper Creates Surfaces with U,V in the Wrong Directions

If I produce a curve in rhino, and then extrude it vertically (or offset it and loft it), the U values will be along the original curve, and the V values along the extrusion vector or offset vector.  This appears to be the opposite in grasshopper.  When I extrude a curve in gh, the U values run along the extrusion vector, and the V values along the curve itself.  Why is this?

I can flip the U and V through Divide Surface, a path mapper or other, and a reconstruction through Surface from Points.  However, this reduces the fidelity of my surface, and additionally is slowing down a later SrfMorph procedure immensely.  

Am I doing something wrong?  And if not, is there a better way to swap the U,V coordinates without changing the surface?  My curves are produced by a subdivision of a larger curve and are thus cropped.  This means that, though the original larger curve was produced with very few control points, to rebuild a surface through Divide Surface/Path Mapper/Surface From Points will require many more control points to retain any degree of fidelity to the original curve.

Help!  Thanks