Asphyxia's Wrath quiver lowering damage

I was testing out a Stormweaver using the Asphyxia's Wrath quiver to scale damage with the double chill, but after testing it I've gotten consistent results that the quiver is lowering my damage. I should've seen at least a 20% damage increase, but I saw about 20% less damage. I've tested it with and without the Heavy Snows passive with no difference. Also just to be sure I put on a random rare quiver and saw a noticeable increase, as is expected. My guess is that the quiver's effect is reversed and making enemies take reduced damage.

not working +1