I've been using the Damage Chart to estimate the damage potential of any given character's attacks, but upon paying more attention I've noticed something that doesn't quite fit the chart for very high attacks - for example, a monster of attack 22 attacks a monster of defence 9 (no relevant elemental bonuses) for 18 damage, rather than the expected 20 - would I be right in guessing the damage function differs above d=2?

Also, I cannot follow what determines the order of attacks at all. I assumed each monster's number of attacks (given by its agility) would be spaced out evenly over some period of time, but that implies that the fastest monsters attack first, which isn't always true:
http://rinkworks.com/monster/results.cgi?game=63&user=whiteknight&battle=12
I'm not entirely sure what to make of the attack order in this game where everyone has the same agility, either:
http://rinkworks.com/monster/results.cgi?game=50&user=alexfrog&battle=13

(I may be overanalysing this somewhat, but I'm off uni for summer with nothing to stimulate my mind...)