Went to Xur to upgrade my Armamentarium chest armor and all my stats went to the beginning. WTF? I'm a casual gamer (a little over 50 hours played) and must have missed the warning from Xur that I didn't need to upgrade my armor since I bought it after The Dark Below was released. No warning? then there should be... I was almost levelled up all the way and now I have to start over - -blam!-!!!
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No if you upgrade it, everything resets like you got a brand new piece of armor.