I'm still noticing a lot of duplicated streams here, for example https://www.openstreetmap.org/way/210580351 which it looks like you've extended to duplicate on top of the existing stream?

I realise this is from a year ago, but if it's an issue from your workflow it would be good to correct it. In JOSM it's a good idea to have View > Draw boundaries of downloaded data turned on and only edit data within that area.