Answer 1:
Definitely. You need to make sure the penset applied to the drawing of your plan, uses a penset that is set up to show the pens as you desire. Check the drawing's settings to see what penset is applied to it.
Answer 2:
The 3D Hatching doesn't
have
to be tied to the lineweight. Try unchecking Uniform Pen for Uncut Contours in your Elevation settings. Then the 3D Hatching pen reverts to it's setting as per the material of the element. In the Materials dialog, you can set the 3D Hatching pen to be 'tied to the element', or you can override it with any pen of your choice. Not exactly a straightforward answer, but the answer is, in essence, the 3D hatching can be semi-independent.
Clear as mud?
Cheers,
Link.