I am in New South Wales, Australia. The capital city of NSW is Sydney. Back in the 19th Century and into the first couple of decades of the 20th C, New South Wales would be written on BDM documents as "N S Wales".
There's also a Sydney in Nova Scotia, which as I understand it was often abbreviated to Sydney, N.S. as opposed to Sydney N.S.Wales.
So, at local family history gatherings where I reside, we have cheerful meetings with fun topics about the latest confusions found on the submitted online trees.
I should also add that I shop in Swansea, NSW; my nearest big city is Newcastle, which is in the Northumberland County of NSW and Cardiff NSW is not too far away either. Nearby, but further north from Newcastle is Gloucester, NSW, and of course to the south there's Brisbane Waters NSW which is no where near (hundreds and hundreds of kilometres south of) Brisbane the capital city of Queensland.
So there's plenty of times our NSW based deceased ancestors have managed, even in the 19th century, marry in NSW, have children in NSW and miracles fly beyond our seas to have babies in same month and year in far away lands (Britain, USA, Canada, "Japonica" ) and even after becoming deceased in NSW, and buried in NSW, photographic evidence of the scan of the BDM cert etc, well, they recover, climb out of their grave, and manage to continue to have children way past child bearing ages, and all this in those foreign lands far beyond the seas .....
Sometimes our meetings run overtime with the latest tall tales to be told.
Cheers, JM