Hi Hannah,
thanks for your explanation. Now that you pointed me on it I could spot the cycle markings on the road surface via the Bing images. But you did duplicate the roads as explained above. Otherwise I wouldn't have spotted your changes. You can see it when you closely watch in JOSM by zooming in very closely. I would have now enough information that I could fix those mistakes from remote, but it would be better if you could to that as it seems that you know these locations.