I'm playing on a private server and use the blacksmith origin. At first it worked, but now no matter the "rarity" of the armor I craft, it has the same stats. If I change origins to something other than blacksmith, it works perfectly. Version 1.6.1.

I can confirm that. apace100/origins-classes#66

Nothing i can do on my end except for remove blacksmith from being a choice in the next update. I recommend changing your class, also please use the bug template that is provided when creating a issue.