I use the A-F syntax search a lot and need things to work smoothly. There is an annoying glitch with the CIC box. If I select all the elements in 'Subject', do a search and then remove them in order to insert another set of search criteria (e.g. 'Location' rather than 'Subject'), a category remains which does not appear in the list of options on the right and which I cannot delete it: 'Distributive Subject'. It affects my searches and in order to delete it without deleting the entire search query I have to laboriously relocate it to a lower level and then delete it.
Here is an image. I tried to delete all the possibilities for Subject and work solely with 'Direct Object':

I'd appreciate it if someone could point out my error or apply to get this thing sorted.