attic walls

[david101]

Does anyone out there know why when you have a brick wrap house with gable ends and the gables are vinyl why the vinyl attic wall does not show properly? What I mean is that the actual truss is in line with the exterior face of the brick and the siding overlaps the brick which is the same as using the attic walls in chief. However, when I change the default attic wall that chief uses (brick) to vinyl and line it up the way it is in the field I have little triangles sticking out of the roof on the sides. However if I leave the siding wall lined up with the lower level meaning the stud walls line up, I have not triangles sticking out of the roof but then have a ledge where the top of wall is for brick to where the vinyl gable is. Is there anyway to do this procedure properly so that it is shown acurately and does not give me proplems when I create renderings or elevations. I will try to attach a picture of what I am having problems with.