Skill NPC's:: Do they all sell the same skills?

I just finished the mission that allows you to go to Cavalon or House zu Heltzer... and I realized, all the Skill-selling NPC's I have run into pretty much all sell the same skills... is it supposed to be like this?

In tyria they had skill traders sell different skills per city, which made getting to the cities rather interesting... does this change later on in the game, or are all of Cantha's Skill-traders selling the same skills?

~prime

After you reach the Mainland (kaineng center) it seems all the skills for chapter 2 are avaiblable to be purchased (all non elites).

Except for the trainer in Harvest Temple, each skill trainer is short 5 skills

Now that's interesting.. Since all the skill trainers leading up to him were the same, I never bothered to check the temple trainer..

I tried, but it was in control of the luxons.

Well, we've won Harvest back now, though I have this aching physics coursework to finish so i'll have a look later.