There could be two reasons why, the current WON ID system requires that when you sign off another computer with the same cdkey, there must be a 5min period in between before that key will work on other computers, so you might've used it on ur other computer then on this, or WON is updateing all the WONID's and their junk, so in the process of changing everyones keys, someone probably god changed to ur old one before yours got changed. something like that 🙂