Adding Spice Models to a Dual OPAMP. Why Doesn't This Work? (7.0.8)

Unfortunately this is not correct if you want to simulate a dual or quad opamp (without any further action).

As just attaching the .lib file is not enough, because it describes a single opamp only. @invntefx above has presented a method for dual or quad amps, it is described in KiCad Eeschema as GUI for ngspice, tutorial for setting up the simulation in more detail.