I take what
ModchipCentral say with a grain of salt. For all I know they could be trying to cover their ass by saying it's legit, when it is actually a clone. Either that, their suppliers supplied them clone cards.
Also, yes I did Googled clone gateway card, and that is how I found the post linked on the first page. This was mentioned quite some time ago on how to spot legit vs clone. So to answer to your question, yes I did read his post, in fact it wasn't even needed to be read, I merely was pointing out a thread about gateway clones and Legitimacy and point out that chances are the OP card is a clone.
Seriously, I think the OP should contact the reseller, and see if they can either send a legit one or refund the money back.