Hi Shane, it looks like probably a bug in MoI handling certain surfaces of revolution from Rhino - when the surface of revolution is rotated or something it's not getting the seam (the place where the surface of revolution is closed) in the correct location.

It looks like the file you posted though has been saved back out from MoI, so it does not have those original surfaces in it where the bug actually is at, it only has the already mangled result in it.

Can you please post the 3DM file as saved right out from Rhino so that I can test the buggy conversion and see about fixing the bug?

Thanks, - Michael