You got it reuby.......

Coil springs are basically one big torsion bar - Helically wound into a usable size.

When you cut springs & remove the flat base, the bit on the bottom starts to combine the torsional load with a cantilever load.
The point I'm getting at is that not only does the spring not seat properly, it also stuff's up your spring rates.

I guess it comes down to that old question... Go v's show