Lofted dome problems

Hello everyone,

I'm a beginner at grasshopper, and I'm having a little trouble with lofting.

I'm trying to make a dome that has adjustable points around the circumference, so I'm attempting to keep separate arcs which can be changed by moving the end points up and down. The only way I could think of doing the arcs themselves easily was to make them between opposite points on the circle. However, when I lofted them it left a gap in the dome for some reason. The ruffle that I'm trying to create at the perimeter is working perfectly, but the dome is broken. Does anyone have any suggestions for how to set it up properly?

broken dome with functioning ruffle

sliders controlling point height, arcs created across the circle, and loft (the circumference points were brought in from rhino.)

original circle set up, with center point attached to arc sliders (above)

thanks in advance everyone!