Hi ...

This one has me completely baffled.
First I made the smaller wineglass type object with a line of the profile and then 'revolved' it ... no problem.
Then I made the larger profile and revolved it to get a result like the one with the plane cut through it.
I erased it and switched to Rhino and used revolve to get the free standing oobject ...
then I switched back to MoI and tried again with the same profile ... only to get the cutting plane again.

The only difference I know of in approach is that with the first small object I create the profile and left it alone.
The larger one, I turned points on and manipulated it a little before doing the revolve.

I know my objects are very large ... the units are set to 'feet' I think ....

cheers,
eric