I will probably looking further into some logged price execution issues as well. I will likely be asking for users with this issue to tell me exactly what they are owed and the Bitcoin address to send the funds to.
How do we determine exactly what we are owed? Does the price lock in when we execute the order, or when ZipZap processes the order, or some other time?
If you had us execute the BTC order then give me the BTC price at the time of your order. Figure out what you received and do the math to tell us what we owe you. Obviously the more info you can provide us with the better.