Is this normal spell-casting ai behavior ?

[Cainehill]

Wauthan said:
Spellcasting AI seems to consider the closest enemy only. It's a great strength in missileweapons that they got better targeting.

I don't think so - I just had a turn in which my four Holy Pyre casters (including 1 quickened one) were bLasting away at the militia and infantry that were much further away than the knights which charged up and killed my troops and 2 of the commanders. It'd make a lot more sense if it actually did target the closest non-retreating enemies, imo.