I've visited Albania and their placement seemed quite random to me. Possibly there was some system in place which I didn't notice (I didn't go to study them specifically). They made up their deficiencies in numbers, but it's a question of how many would be manned and supplied in case of war.

I've also visited one interwar Czechoslovak fortification complex, and these were completely different beasts with an elaborate design (network of connected fortifications, vast underground spaces/infrastructure...). But they were also much more expensive to build than the rudimentary Albanian designs.