welcome to the world of cheap aftermarket suspensions. you will likely just have to live with it.
it prob has something to do with the nut on the strut shaft that tightens down the spring hat. did you compress the skunk2 spring when you tightened that down? that sucker needs to thread down as much as possible. if thats not the problem, make sure the top 3 flange nuts are torqued to spec.
*edit* this is what im referring to