zoomkat:
Are the servos now performing as desired? You could trim the header pin bottoms that are contacting the USB connector, then put a piece of electrical tape between the two. You probably also need to sand some on the plastic servo connectors so they fit the header pin spacing. If controlling a lot of servos is needed, the ssc-32 servo controller does a nice job and easy to connect (bit not a "shield" form factor).
Hi zoomkat, I thought of that too but even I sand them to flat it still doesn't fit. About SSC32, it was one of my option and I believe it works better than the one I am using but I don't find much info about how to use it and I am not the guy has electronic background. Perhaps you have any info relate to it?