"Why Do My Old Keywords Keep Reappearing on Photos in Adobe Bridge?"
Adobe Bridge can be infuriatingly quirky if you've ever applied hierarchical keywords to your photos in either Bridge or Lightroom. What are hierarchical keywords? Those are the keywords organized in levels, like "Places > Washington State > Seattle" or "Events > Anniversaries > 50th." Besides being associated with each other, they can even be applied together automatically. Using hierarchical keywords is a safer practice in Lightroom, because the keywords and hierarchy for each file are kept primarily in a central database or "catalog" and can be instantly modified there for your entire photo collection. But Bridge has no such database -- nothing at all but a simple list of keywords to show in the Keyword panel. The keywords and hierarchy for each photo can only be written directly into the individual photo file or its associated XMP file. And if you modify your hierarchy in the Keyword panel, or discard it entirely, the original scheme