Quadding more than 4 mobs?

[maestrom]

What happens if you have 8 mobs bunched up and you lightning strike them?

I grabbed a few mobs of different level ranges and tested it out.

It looks like the spell will target the lowest level mobs in the bunch, even if those targets do NOT include your target.

I had a white con targeted and even though I cast on him every time, the spell hit the blues and greens in the pull.

Is it random and that's just how it worked for me or is this actually how it works.