Arek! The dashed lines function in SketchUp is extremely limited. They completely missed the mark when they implemented this feature. It would have been infinitely better to assign dashes to lines in the entity info dialog. It is what it is! You are likely noticing edges I have turned to dashes using the Dashed Lines plugin, http://www.smustard.com/script/DashedLines.
ConDoc Tags can only be applied to groups and components, not edges or surfaces. This is an accepted limitation that drastically increases performance.
I believe the basic line drawing 00 style is used for background plans.
I moved the more simple “full background plan” to the ARCHITECT drawing set as a plan. You will find the old method in the “send to CAD” drawing set within the labs folder. Just click on the load drawing set button…