I agree that the second note is clearly included within the listing of the first. There are some small differences between P#63, P#64 and P#64A which could be elaborated in the combined entry if not put into separate entries. For example, P#64 has "BCV" in the guilloches either side of the denomination on the obverse and P#64A has quite a distinct border on the reverse. For me, these are distinct notes but the 1992 P#63 is the same as all the other P#63, so there's no need for that entry.
Former Numista referee for banknotes from Ireland, Northern Ireland, Scotland, Wales and Saint Helena.