Where exactly is Coupar Angus?

Coupar Angus is a pleasant little town, with a slightly complicated geography. It's generally accepted that it's mostly in Perthshire, but partly also in Forfarshire/Angus. I say generally, because it seems the new Scotland's People website has a third option - it's in neither.

The clipping above shows what happens when you search for deaths in Coupar Angus in 1855-1890. There are quite a few, a little under 70 a year. (The actual number will be somewhat lower, because married women are indexed under their maiden names and married names.)

But were these deaths in Angus or Perthshire?

Not in Perthshire, apparently, so presumably they were in Angus:

Oh. So where was Coupar Angus?

Somebody's got some county-coding mixed up ...