For complete transparency here is what happened :
The issue is on our market data providers.
We lost the market data access for around an hour or so, we got it some time after your bet was started thus we took an incorrect trade value for your bet.
We are tightening our protection system.
If anyone had the same issue while loosing a bet, contact us and we will correct this as well. I dont think this happened a lot, I found only one bet with the same issue with a quick search and it has been winning.
If you happened to win a bet which you should have lost instead, then well lucky you
You can bet freely, sorry for any inconvenience
Please note that we still have the system where we take the price of the first trade occuring after your bet is registered on blockchain.info.