Dino X isn't designed to work on other algeas
It is specificially designed to target the dinoflagilate animal in a manner (when the directions are followed exactly) which will not cause harm to any other animals in the tank.
I know that there are some reports of it being used for green hair algea, briopsis, etc, however, that is not it's intended/designed use
Don't forget that you will get a false reading on phosphates when there is a significant amount of algea present as it is consuming it, so your reading is only what is "left over" and not being consumed by the algea.
Also, don't forget that Dino X was always intended as a "last resort" treatment. Have you tried increasing the number of water changes, running high quality phosban and carbon media. Do you use RO or tap water?
Sorry for the all the questions, just hoping we can solve this problem.