Let me be clear, I am not taking anyone's side, I simply asked if you had omitted anything from your version of events. To answer your question, a vendor can cancel an order at anytime including when it is in resolution. Under normal circumstances this would be the most preferable outcome for a buyer because they get fully refunded without any damage to their stats. In this situation though clearly that did not result in the outcome you were seeking. If what you are saying is true it can easily be verified because all messages can be reviewed by administrators. I will pass this up for further investigation and I would ask you to report it via the market site and submit a customer support tickets detailing what you have explained here.