Rule of thumb with abilities of any sort in Pathfinder - the first sentence is nearly always flavour text that has no bearing on gameplay mechanics.
If it gave Expert Crafting it would specifically say something like "you gain Expert Proficiency in Crafting" in very clear and unambiguous language. The same way the class features that boost your save proficiencies makes it very clear that they increase your proficiency.
I think I saw in another thread that Mark mentioned this was language that was intended to be removed. Apparently at one point in development they were going to give automatic progression for crafting, but that was taken out before the playtest.
