Key Fob replacement for 05 that reports in software as 06
 

Lost my keys for with the only fob for my 2005 A6 (still have the valet key). Ugly, ugly experience having to re-key the house. I bought a 2005 replacement from eBay and had a local locksmith that has experience with Audi keys. He put my car on the computer and the programming for my '05 A6 reports itself as an '06 so the keys didn't work. Has anyone ever seen this? Also, apparently the car was mfg for the German market based on some other info it reported. Has anyone ever heard of this?