for a lot of reasons I would be skeptical that there was black pigment in the red. Ashley red is pretty brite and I can't visualize the addition of black to "build" the color
I would , as Steve said, Look at the spray gun , dissasemble it, clean it,, check the strainer for contamination, check your air / water trap on the compressor,, then make sure you are not getting crud through the air lines, check the thinner,,,
that said, it is possible that there may be some black in the red,, but, only way to know is to try another color. Maybe spray out a test panel with white to see if it shows up in the sprayout to help troubleshoot..
good luck,, as I have said, painting is about 25% science, 25% skill/experience, and 50% making your own luck by biasing everything you can in your favor,,,,