Sorry I didn't read all of the above.
Breadboard view is a bit of a mishmash. Originally it was probably for children to do what they see so it had to real world, i.e. if it's not 2.54mm pitch the FZ part shouldn't be able to fit any of the boards. Basically you can't use a double row header on a breadboard, but because it also does pref/strip board it should have double row. Pref/strip board should probably be removed from BB view and moved to PCB view.
I suppose you could make a Dupont ribbon cable so long as it is dead straight.