I don't think they skipped around on the plaque numbers, so they make some sense. It's just that the 08's didn't necessarily leave the plant and sent to the vendor in the order built. From what I could tell people weren't getting car 2500 delivered with car 4000. My friend ordered his 12/3, and mine was ordered 12/4. They were built a day or so apart and I believe his number was 2093, mine 2133.