Okay, so I tried to use my homing logic in your example here in case I did something wrong in my project, buuut in both cases it only worked in theory, by that I mean with the traces. In case of two enemies, still only two projectiles spawn.
I still think there is something wrong with how I set it up. I mean if it only finds two enemies it will based on what I built only spawn as many projectiles, up to 6, but I can’t think of another way to determine the targets. 
But see for yourself:
TurretTest.zip (1.7 MB)