Section Plane Settings?

Hello all,

I am trying to master the 3d model to drawing process and so far I've found it quite good however there is one thing that I find I need clarification on.

When I use the 'section plane to block' command I change the settings to the required values that will produce the section cut view I want (capture). The setting that is not clear to me concerns the 'Background Lines' part.

I want to see background lines so I set 'Show' to yes. I want to see 'Hidden line' so that is set to yes. The layer is set to BM_visible (continuous) but the result is all background lines are shown including hidden lines but the hidden lines are on the BM_visible layer as well (capture1)

Thanks