Percentage of quest completed off??

[dizzymommy]

Today I was going through my quests and my sons. He needs to recover 12 of something. Well he currently has 2/12. His quest is showing that he is 11% completed but according to my math calculations that would equal 16.6% complete. Also on one of mine I have 5/6 pearls(recover from defeating navy ships). According to my calculations that should be 83.3% complete. The quest is showing me as having it 72% complete. On my quest I'm not getting an item each time I sink a ship. So I'm wondering is it a bug or a clue to how many more ships/skeles..etc we still have to beat? So maybe recieving your item isn't completely random but you get your items based on the level of what you are defeating for an item which will gradually increase your percentage completed...hope you can make sense of how I worded this.

I know in one of the earlier quests where you have to defeat the EITC officer (assasin quest) me, my son, and 3 of my friends all were rewarded with capturing the assasin on the fourth try. Now I wish I would have been paying attention and seeing if the quest went up 25% each time we defeated the EITC officer.