I don't want to belabor the point here, but yes, you are wrong. The legendary armory is a recent addition. People that crafted legendaries before it existed could very well be unaware of the new system. Knowing the process for crafting legendaries years ago has nothing to do with this.
The OP came and asked a legitimate question and it was answered with links to educate them on how this now works. End of story. Clear enough?