I got the diagram for "hammer, forge" and used it to learn it. I have the skills needed (I'm max in all crafts). It was my first blacksmithing diagram so I got an achievement for learning it. The achievement is showing in my achievement list. I collected the ingredients i needed and went to the forge. I couldn't see it in the blacksmithing interface. Tried unchecking the boxes for "have skills" and "have ingredients" in case I missed something. Still not seeing it. I can see other patterns I've learned, just not this one.