So today i was bored and tried to test some rogue skills. I unlocked armor reduction in shadow Pierce and in aimed. Took a while when i tested and found out that it don't stack. When i shot aimed and then Sp and it apply armor reduction then -15% from aimed is gone and in place comes -10%. Why it don't stack while it should ? I heard that max reduction is -35% that we can stack and here -25% not work... SP is bugged?