How to panelize a polysurface evenly

Hi Everyone,
I’m new to Dynamo and I’m trying to panelize a complex surface. I’m using a .SAT file exported from a rhino file. When Imported to Dynamo, the Geometry.ImportFromSAT node outputs two surfaces… I would like to know why. I however managed to create a polysurface and apIy the panel nodes contained from the lunchbox package, but the result I get is panels of uneven size (see image below). Could someone help me figure out how to proceed ? Thanks

2017-09-25 Surface to panelize01.sat (131.6 KB)
surface to panelize.dyn (4.8 KB)