IMHO the "bug" lies in boss loot. Standard loot mechanism in Aion rewards the winning group/alliance/league only (so 192 people max).
As in siege/altar/WB, any mob
If a 2ppl-group "win" the boss, only them shall loot...
providing that 192 person league has more total hits than a 3 allly league full of very fast hitters (some of which were "enhancing" their speed).
When the 3 ally league did hit more (aka dps race) it meaant they got loot, but because there was no longer 192 loot available, it means the 192 didn't get any loot, and it went to the next highest dmg group. (This is how invasion mob loot worked)