Here is how it typically works. if you call, it will be opened up on all receivers in the house. There is a extra charge for ordering it that way though.
If you order it on one receiver, then order it on another receiver on the same account, both receivers will call DISH to reported, but you will be billed for only once.
I've done such numerous times with PPV events.
It could be different for WWE event, but I doubt it and have seen no proof.. a chat log by someone likely in india means nothing.
I wouldn't be surprised though if you order the event in HD, you can't get the SD version. This because of the way Dish's system works for tracking fees to program providers. HD and SD on different channels, so a hit to open one channel isn't necessarily gonna open the other one.