I've searched and been unable to find help for this problem. It's been going on for a very long time now and it's driving me crazy. I have a very extensive set of keywords listed in a hierarchy. (i.e. United States > Colorado > Rocky Mountain National Park > East Central > Bear Lake). Unfortunately, whenever I use the "Edit in" feature in Lightroom, such as when I need to blend two images in Photoshop or convert to BW in Silver Effects Pro, it corrupts that hierarchy on re import. I end up with duplicates at the bottom of my keywording list. By the end of a month, it is a complete mess.
Does anyone know why this happens and if there is anything that can be done to avoid this? I'm using the latest version of Lightroom, Photoshop and Silver Effects.