Here is the blockchain info for 9 refunds... mine was in this batch.
https://blockchain.info/address/1JrwWrt3TYUzMYFEBLX5hTo1zFsEY6tWZN





Hey, check it out - the address that paid you got it's coins from https://blockchain.info/address/15PW2jpo212JGAoYa6WB6FBUMdGzBqmDT6

Which came from:
https://blockchain.info/address/158mVoizfU3xPxGGchGtnsKSixGs9XTo6v

Which in turn got 10,000 coins from: https://blockchain.info/address/16ygEoTjg7P5GJwLKTQd1UgqAGuF8bKVRc

And, that in turn got it's coins from: https://blockchain.info/address/1FGAftzSTztFSB8LMwsrdCKTyqGY6zr3sU

Which, if you'll remember is the "mystery address" that Yifu said "who say's we control that address" (or whatever)

I happened to remember the 158mVoizfU3xPxGGchGtnsKSixGs9XTo6v address showing up in a discussion about a mystery solo mine somewhere.