Crafting Tutorial prematurely awarded achievement

1. Title: Crafting Tutorial prematurely awarded achievement
2. Reproduction Rate: I imagine 100%
3. Blocker? No, just a bit of a cheat...
4. Details: I started Edwin's crafting tutorial expecting to go through all of the crafting processes and make my own leather helm. However, halfway through, I needed more curing salts, so I went back to Edwin to buy them (since Martin didn't have any), and Edwin took one look at the Leather Helm I bought weeks ago from a merchant in Ardoris, and he assumed that I made it myself and just put it on my head while he wasn't looking! I hadn't even crafted any Yards, or sewed them up on the Tailor stand yet!
5. Steps to Reproduce:
   A) Purchase a crafted Leather Helm in advance, from the public vendor.
   B) Visit Edwin and start his crafting quests.
   C) Proceed through the quests until the final step, where Edwin instructs you to cure some Leather, bind some Yards, and tailor some Helms.
   D) Return to Edwin when you run out of curing salts. Or maybe even return to him right away.
   E) Notice how he marks your quest Complete, even though you haven't crafted any helm yet. The quest doesn't check that you made the helmet specifically, it only cares that you have one.
6. User Specs:
   GPU: Geforce GTX 960 2GB GDDR5
   CPU: AMD PhenomII Six-core x 2.8Ghz
   OS: 64 bit Win10 Pro