User blog comment:Furkan Zomer/Possible Solution - Cursed BBI Weapons and Armor lv.3/@comment-7996849-20130701135746/@comment-83.251.179.181-20130702231459

So essentially the explanation for the armor thingy would be:

1. Do not purify your last piece of level 3 armor

2. Keep purifying (and getting more pieces) until you get what you want, but do not puriy the last piece or the sequence will reset.