Looks like yesterday my transaction was returned to my wallet, they credited too much back, I think they actually credited 2 back, and I had about a surplus off 1000USD, today it looks like they debit my account for 1 of the transactions that they said didn't go through but the book said it did. If I moved all btc when I saw the surplus I think there would be no way for them to claim it back but I left it in. How could something like that happen?