I had this issue yesterday, where a user had an HP laserjet 2050 that was printing out the previous print job, I checked this site and it only had info regaurding network printers...sadly the solution did not apply to my needs. after some troubleshooting I attempted a longshot and installed the HP firmware update. This fixed the problem instantly, release version waws 20120615 (released July 13th 2012) Below is the URL
download it, run it and save yourself some time.
TM
download it, run it and save yourself some time.
TM