I had difficulties understanding http://freecadweb.org/tracker/view.php?id=693
. My understanding was, 693 is about not to be able to select one construction line from another construction line overlapping it. My understanding from overlapping is, both lines have each one part laying at the same location and another part of each line is non overlapping.
The new bug report is about you always select the construction line and can not select the normal line on top of it.
But it could be, I have only a different understanding, due to my limited knowledge about the English language.