The problem your having is common with your color choice... reds, purples, blues and some exotic colors have this issue...
Its a dye vs pigment situation, in order to get that color blue, the tint base (the un tinted gallon of paint) is almost clear, very little pigment, pigment gives you coverage, dye gives you color. too much dye and not enough pigment means you should add a grey primer first.
with that said, do you have a bigger/better picture?