I was only in the large beta, but I believe it has to do with your character level. I had to hit 17 before I could start the next tier of mission skill missions, and I believe it is the same for the availability of craft recipes from the vendor. For items equippable by level 11's, I think you need to be level 11 for the recipe to show up as purchasable.
Has nothing to do with the level of your character.
you can be level 10 and craft level 50 gear.