Delete or add tag columns

I have 4 "tag" columns (or really categories) that I have created.  Yet Rekordbox 7 has duplicates of some of those tag columns(categories).  For example "Components". My components "column" already has all my custom components and most of my songs "tagged" appropriately.  but now there is YET another "Components" column (duplicated) and I want to delete it.. but you can't...only its tag properties (tags) that belong to that column.  For example "Component" is the column and "Synth" is the tag property.  I can delete "synth" but not "Component". Is there not a section where I can manage all this in a macro way.. not this fumbling little window that doesn't let me really do anything?