As I PM'd I intended to keep the double. Anyway as it turns out zenmarket reckons it is sold out so they were not able to complete the order. :(
Very strange though because if I add it to my cart in 7net and choose cash on delivery I can get to the very last step before completing the order. I've asked them to clarify but it doesn't look like the proxy thing is going to happen.
I first enquired with them on Monday so it just takes way too long to make an order through them for limited release stuff like this.