If you post an example file for (1) I can better examine the issue.
As for (2), that's expected yes. Closed splines will generate closed meshes. I guess I don't understand why you'd ever want a closed spline to generate an open (but capped) mesh...?
As for (2), that's expected yes. Closed splines will generate closed meshes. I guess I don't understand why you'd ever want a closed spline to generate an open (but capped) mesh...?