Just got smoked in a combat that I *thought* wouldn't happen--was this a bug?

[Yossar]

Originally posted by pole_shift:
The attacker (whomever's Capitol you were besieging) was moving into an enemy province (the one with the capitol but controlled by UDH = "undead dolphin hacker"). UDH was moving *his* army as well into an enemy controlled province. The question is: which movement happens first? I believe (but would like dev/veteran confirmation) that the order is randomly determined.

i.e. bad luck for UDH

All non-friendly movements occur simultaneously, don't they? Which is why if you try to chase a unit you'll never catch him. I guess either someone magically transported in (would that result in a battle with just that unit since magic battles are resolved before movement?) or he got stopped by the small unit moving in (There's some kind of check when two armies collide with a result of one or neither getting stopped?).