Market ordered filled twice

I put in a market order for a powerstone. The order was claimed and filled twice. They were done really close to each other and I would guess that's why. I can always use both of the so that's fine but I wanted to make sure that both people who claimed them got credit. if not let me know and I can either put in another order for you (preferable to me) or return the powerstone.
I hit take all and don't remember exactly who sent them but the emails said Sarcasms and Briseadh.

Most likely because a user didn't claim the request or click "Sent" If a user doesn't click "Sent" it expires and goes back into the Queue.

I got emails for both claimed and sent. as well as a powerstone from both. Both claims and sent emails were within a couple minutes of each other.