Wow, they are my registrar...I've had no probs w/them. Obviously, this happened due to some n00b CSR...who has since probably been fired.
I mean, if the email on record bounces, they still have the name/phone/address/etc of the person/company that originally registered said domain. It is/would be good business to attempt contact via another method before selling the domain out from under them.
Besides, how can they sell a domain to someone else if the registration period had NOT yet expired?

Explain that one to me, please.