Hi there, yea, that about sums it up out here on the bleeding edge, expect cuts I think, but would agree in general for this such a new territory for seeed, IMO. it can ONLY get better 
We can try, help each other until then 
Did you see my video of the board and servos in action, maybe that will shed some light, I set each servo up first with the address, sounds like that may be part of it. Then the jumpers, it may be echoing all the commands and really driving the thing bonkers. Provide a picture please, let me see, what you got going on
HTH
GL 
PJ 
Stay at it you will figure it out, your close.