what is up with the levelling up system in ffxi? when I first started out i was getting 50 exp for easily slaying a bee, now i slay harder monsters and am lucky to get about 50.. but it is 2200 till my next level up (lv8) not 500...

Also why is it my brother, a warrior Galka in Bastok is getting 100 or 120 exp for easily killing worms at level 3 but at that point i was only getting about 35 for killing harder monsters with my BMG taru... just doesnt seem fair :-(

The game gradually pushes you into partying and not soloing. It's impossible to solo through the entire game. Around level 10, if you don't know which mobs are easy to kill for xp, it'll be next to impossible to solo. An IT worm is a lot easier to kill then say.. and IT crab. You'll see a lot of people soloing worms at various levels (especially rangers who can stay out of range and shoot them from afar).

Your brother is probably getting more xp because I'm guessing hes running around killing IT worms.

This game is mainly of partying. After level 10 you need to stop soloing and go to Valkurm Dunes and get a party. From that level and up you will be partying and dying and getting annoyed, but at the same time having fun and getting addicted to the game :P

The exp is not a big problem. After some time, you get used to it and understand it. This game is made for people that doen't want to be alone when playing.
That is the point of the online RPG: to interact with other real players :)