Overlap shape please help me

Hello,
I need to split the overlap circles.
I made a coulmn in grasshoper with a circle and elipse curve and than I used the loft commend to make it to surface.
the problem is that it I joined the overlap circle to one shape the loft isn’t working, I tried to do this with two shape sepertaly, one shape is thecircle and the other shape is the overlap shape and than join then but that also doesn’t work.
I also tried to split between the shape and curve in rhino but that doesn’t work either.
I think that I need to split the overlap shape after that I used loft.

how do I split them?

Thank you very much!!


Probably (?) you want a result like this ? :