This past weekend, I was programming and doing a show with some generic RGB LED's on a Congo. In one preset I had the blue at 100, red and green at 0. In another, I had red at 100, blue and green at 0. Presets were then assigned to master playbacks. I brought up the "blue" preset, then the "red" in an attempt to mix, but they were cancelling each other out. I tried to Mask the other colors to eliminate this, but mask had no effect... What was I doing wrong? Thanks!