Closed loft oriented towards wrong points?

I've constructed a 4 sided Umbilic Torus using 20 star-shaped ribs. Each is rotated along it center axis by 18 degrees from the previous rib. In this way a complete (20 ribs X 18 degrees) 360 degree loop is achieved. After initially lofting the components (see "open loft" pic) I then proceeded to change the Loft option to "Closed" (see "MU Loft Closed" pic). The result was the 20th surface being inconsistently joined to the lst rib - as depicted with the green lines.

The desired result [as indicated with yellow lines] is to have the closed lofting between the 1st and last rib be consistent with the contours of the previous 19.

I've unsuccessfully tried a way to disassociate the relationship of the "green" lofting points to allow the lofting surface connection to the desired "yellow" points - with no success.

Any help in solving my riddle is greatly appreciated! 

Thanks,

Greg