I'm confused by your message so please help clarify what you are stating. The 924 was bought in July 2006, and then the 964 was bought in January 2007, correct? Was the 964 bought retail as a separate purchase, or was it bought as an upgrade/replacement for the 924? If it was bought as a complete, separate purchase then the 924 warranty 0f 07/2006 should have no bearing on the 926 at all. If it was bought as an upgrade/replacement then the original warranty overrides the date that the newer model was received. I have experienced this with monitors, and other devices that I have had replaced and even though you get a "new" replacement unit for a defective unit that new unit assumes the old warranty. I hope this helps clarify your question.