There are a number of ghost categories in Collectables> Transportation that point to categories in Books> Non-Fiction. Currently I think their names are a little misleading and would suggest the following amendments.
There is a ghost category Collectables> Transportation> Transport. Could this please be renamed Collectables> Transportation> Books.
There is a ghost category Collectables> Transportation> Railway & Railroad> Railroad & Railway. Could this please be renamed Collectables> Transportation> Railway & Railroad> Books.
There is a ghost category Collectables> Transportation> Bus & Coach> Buses & Trams. Could this please be renamed Collectables> Transportation> Bus & Coach> Books.
There is a ghost category Collectables> Transportation> Trams & Tramways> Buses & Trams. Could this please be renamed Collectables> Transportation> Trams & Tramways> Books.