Answer:
ok, so you know how you start out as a NEWB correct? now if you didn't know, you don't start with a worst enemy or fav victim (zOMG! NO WAI!) now, After you get 100 points, you are eligible for getting a fav victim & worst enemy (don't know why you have to wait... but that's the way it is)
Ok, so you kill n00b#1 10 times in a round, w00t, now you have a fav victim
SO, for worst enemy n00b#2 kills you 5 times in a round
done, you now you have a fav victim and worst enemy.
that's all that BFHQ records correct? But on BF2s, you can have multiple of each, the way that works is, that you have to either kill n00b#3 10 times just after he gets 100 points and then you get HIM on your fav victim list
but if n00b#3 kills you 5 times after he gets 100 points, then you will have him ALSO on your worst enemy list
the way to prove this is to check the stats of your worst enemies, and you will notice that they all have YOU as their fav victim, same with your fav victims and their worst enemies
does that make sense? if not, just say so
PS- oh yeah, sometimes BF2 screws up and random people are added to your fav victim list or worst enemy list, the reason for that i haven't figured out yet
like for me, i have my worst enemy is "KarateKidIsMe" but he's a 1st lieutenant and killed me 9 times when i had a bad round
why i suddenly got added to his fav victims is beyond me, i've been killed by 1 person more than 9 times before, but o well