Porch with Curved Roof - Soffit missing

[SNestor]

Wondering why I don't have a soffit in the gable end of this porch curved roof?  See the section...

 

 

- I wanted the porch concrete to extend beyond the edge of columns so I have used two walls to create the space.  

 

- Wall #1:  1-1/2" wide wall called Porch Definition Wall-2.  There is "no line" to define the edges of this wall in the wall definition...but, the wall appears anyway because the layer has a line definition.  This is confusing to me.  What does the line definition in the wall DBX actually control...it seems to me the over riding control is the layer?

 

- Wall #2:  This is the railing wall.  Why does the line of the "beam" not appear?  Is there a way to control this?

 

Is this the most efficient way to create a porch room?  Or...am I working to hard?  The appearance turned out ok...so I am happy about that...just wondering if there is a better way?

 

Plan attached 

Front Porch Design - Curved Roof.plan