You could always get sent more than 1 pin, but you cant use more than 1 pin on a reservation..
In my case, I was sent the 30% off pin before it was a public discount, and then I called yesterday to ask about FD since there has been talk about it here, and I had one too!!
So, I applied the FD pin on the reservation since that saved us more money - my boys are 12 & 10, so that makes 4 adults in my family and DxDP is not cheap!!
I've definitely read here on the Dis that some folks seem to get more than one pin code, although we've never experienced that. We've been lucky to get one pin code each year for the last 3 years but that's it - only one.
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