Fareastdriver,
I think you are correct. But I have spoken to a pal who passed out from his fitter's course just after the change and he is adamant that he wore the single upside down stripe !
I think the answer may be that many of these 'wunder schemes' are introduced before the correct kit is available and thus many continue with the old. He tells me that some wore the upside down stripe for a long time until they were ordered to change..We always regarded it as a sign of our superiority in the ground trades !