Main Job/Adv. Job/Sub-Supporting Job?? somebody explain please

[The Oolahoop]

Your main job is the job that defines your toon(stats, weapons and armor allowed). You can get a sub job at lvl 18(need to do a quest first) and that job gives you its abilities(exept the one with a 2hr refresh timer) and some of its stats, but you sare not allowed to use equipment that your main job can't use(it prevent from having WM running around in full plate) Advanced job is like any other job but it can only be unlocked when one of your job is at lvl30. Once the advenced job is unlocked you can use it as your main job or sub job. So you will never have more than 2 jobs at a time. All the exp you get goes for your main job.

Oh and one more thing: Your sub job can never be more than 1/2 the lvls of your main job. Don't worry you don't loose any lvls on your sub job, you just don't use the extra ones. And all the exp you get goes for your main job.