As far as I can tell, yes I've updated the legend. See new screenshot. It's like the field width is cutting them, they all begin with one long and then one short line..
I have a several different line shapes files that represent buss lines. When I set "Pen style" to different styles I see the changes on the map but it doesn't appear correct in the legend in QGIS map composer.
Fix or work around needed! Using QGIS 2.0 on Mac.