I thought they'd got it all wrong too in " Three score and ten" when they sing about "from Yarmouth down to Scarborough": on my map it's up! But the explanation I was given was that the boats were going back to their home port of Scarborough, hence it was "down home". (Although they were "lost from Grimsby Town" - confusing, or what?)

And I once said in my local session near Edinburgh, "I'm going to sing a song from the North-East" - to which, the remark was "Which North-East?" - it was in fact from NE Scotland, but eith my English accent they couldn't be sure!