Unfortunately those "counties" aren't actually counties but council areas. So for instance you have a large town or city that has its own city council area which often includes part of the surrounding countryside.
To put this in USA county terms it's a bit like ignoring state boundaries and creating extra "states" for major cities it wouldn't really make any sense to people on the ground. The United STATES is broken down by STATE then county, in exactly the same manner the United KINGDOM is broken down by KINGDOMS then by county. Sadly Groundspeak screwed this up and it would take too much work for Project-GC to fix.
However the treatment of counties is very odd and uneven. I suspect someone from outside the UK at project-GC initially searched online and found the above linked Wikipedia article and thought that will do for a definition of English counties. They then must have searched for something similar for Scotland but unfortunately they goofed here too and picked boundaries that were abolished 20 years ago.
So so we have the doubly bad situation counties in England use very modern boundaries that are what the local council boundaries are ie: a confusing mix of former district and county council boundaries. Whereas in Scotland they use a set of boundaries that were only ever in use for about 15-20 years and were abolished 5 years before geocaching started. Ie: neither historic boundaries nor modern boundaries.
I can understand the logic behind the keeping of the English boundaries as they do at least match the modern council areas even if they are a hotch potch of two different types of authority. I cannot understand the logic for keeping the current Scottish boundaries at project-GC which are based on a temporary fad boundary that was abolished before geocaching was born.
Could we we at least have the Scottish boundaries match the modern council areas to bring them into parity with how English boundaries are defined?