I feel that I've totally been stolen from. When I place my bitcoin here and try to mine, I usually pass my hash limit by at least 2x - 3x! You guys need to fix your limit stuff! I usually try to leave my orders on for at least 24 hours at a time, but I ALWAYS have to log back in to check to make sure you guys aren't adding more hash to my order to make it disappear faster! Fix your system and my money needs to come back!
Our speed limitation is only approximate and it can never be exact. The reason for that is simple - we are not fortune tellers, we cannot tell what speeds will rigs that we assign to your order eventually have. When you create the order, you are clearly notified about this.
Also, you do not pay anything more. If you pay more, you get more speed, too. At the end, your coins are not stolen.