Exp and Leveling

[Avalon_Fates]

Ok when ever you kill something you get a certain amount of EXP as we all know that adds a certain percentage to our lvl, but no matted what ammount of exp i get that levels me up. 5%,40%,500% i always seem to only gain one level. Now heres my question for the kiel quest you get something like 700k exp for finishing it. That seems a bit unfair seeming as thats only 1 lvl regardless. am i wrong or something.