I've been doing a lot of smithing so far and I am really enjoying it, but when I try to forge certain things like one handed axes, it says "You haven't unlocked some of the selected pieces". I only have a few options unlocked for axes, but all the combinations say the same thing. I've double check to make sure I have enough materials and stamina and it is below my maximum difficulty. I've tried altering the size bar as well. My current smithing level is 55.

