Those shocks are probably China crap. I saw shitloads of them on ebay. If MC shocks are anything like aftermarket automobile shocks, if you put the vast majority on a shock dyno you will probably find that they exhibit the following characteristics:
1) They perform worse than OEM in every situation you throw at it
2) They perform differently shock to shock
3) If adjustable the adjustment knob does not do what you'd expect/what is advertised
4) The adjustment knob does different things shock to shock including the complete opposite
I don't know much about the players in the aftermarket MC shock world but I'd expect that if you're not paying top dollar, and even sometimes if you are, you're getting junk.