Do i need to level up my job? at the same time as I level my toon?

[Niwashi]

One more thing about the hunting log: There are several different hunting logs.

You have an Archer hunting log, and if you unlock Pugilist you'd get a Pugilist hunting log, and the same for every other class you add. As far as these class hunting logs go, you only get the hunting log's XP bonus if you kill the mobs as that class (or its associated job, which as mentioned earlier, is still considered to be that class). If you complete all 50 entries in a particular class's hunting log, that earns you an Achievement and a level 50 (Item level 55) ring for that class. (That ring is far outclassed by other ones easily available at level 50, though, so is probably only significant as an achievement to say you've completed something. Some people care about that sort of thing and some don't.)

Then there's also another hunting log for your Grand Company. The GC hunting log rewards GC seals instead of an XP bonus, and it doesn't matter which class/job you use to kill the mobs. A couple of the ranks of GC promotions require having completed a tier of the GC hunting log. (I believe it's the first tier of the GC hunting log in order to become a Sergeant Third Class, and the second tier of the hunting log in order to become Second Lieutenant.)

I know I've heard from other people who got to the point of trying to get a GC promotion and being confused because they thought they'd finished the appropriate hunting log tier, but had actually confused it with the class hunting logs. The promotion requirements are based on the GC hunting log, not your archer (or any other class) hunting log.


EDIT:
And I forgot, the third tier of the GC hunting log, while it isn't needed for promotions, does have an achievement associated with it, one that rewards a mammet minion that carries your GC's banner.