Could your problem be associated with Exchange Rate commissions?
I get into these problems when I try to get cash through Neteller Credit Card. I have a US Neteller account and whenever I try to withdraw some cash, they convert it to Canadian Dollars (and charge 2 dollars for it along with less than market value for exchange rates) and when I try to withdraw cash from the neteller card, it short changes me again.
In your case, I tend to believe that the following statement could be the source of the problem. (Or atlease I hope so)
'Player accounts are tracked in US dollars so deposits made in currencies other than US dollars will be converted at the current bank exchange rate.'
The sell rate and buy rate differs
Cheers!
Sri