Freiexchange contacted me earlier and i have passed on the details to the dev.
And when does something happen? The transaction over 9950 QRK has now disappeared since nearly 2 days. According to FreiExchange this error has to be fixed by the QRK Devs.
This is not how you can work and deal with your "partners". One has more and more the feeling that one is not partner but annoying opponent.