Hi!! ^.^
If you're not able to learn more than Journeyman your second profession its normal cause its bugged. But there's a nice script to repair that.
While you're talking to the trainer tip:
/script BuyTrainerItem(0-4)
0 = Apprentice
1 = Journeyman
2 = Expert
3 = Artisan
4 = Master
If it doesn't work... be sure the trainer can train you to the skill you want. It doesn't work on trainer bugged in Supplies!!