Strange casting order

[ano]

In my current game I scripted two mages to teleport to the enemy province.
One had to cast undead mastery and another one - vortex of returning. However, the second mage acted first and both mages successfully teleported home. Vortex caster was (and now he is) second in commander view (so I thought he had to act second). In my tests everything worked fine.
Can anyone suppose what could it be?

[NTJedi]

I could be wrong yet I believe the casting order is determined by the game ID of the mage/commander. Hence if you buy a mage/commander on turn_1 his ID number is *usually* earlier than a mage/commander bought on turn_50.

I say *usually* because sometimes other mage/commanders die during the game and so that game ID becomes available for the next mage/commander which comes into existent.


I could be wrong as this is only a theory.

[ano]

Normally commanders in commander screen are ordered by their id - that's what I meant. So I expected that the mage with lower id will move first.
I opened the turn file under -ddd options and saw nothing special in logs. Mages were "deployed" in correct order, but the astral caster just received his turn earlier.
I wonder if this is a bug or I misunderstand something. I always thought that the order in commander screen determines the casting order in battle. How can I plan battles if it is not always so?)

[Endoperez]

AFAIK, the order of ritual spells is supposed to be inverted about half the time. I haven't heard that it should also be like that for battles, but that could have caused this.

[ano]

AFAIK, rituals are cast in random order, aren't they?
Manual says:

5. Rituals - All mages cast their rituals in a random order

[Folket]

But then niether undead mastery or vortex of returning is a ritual.