I kinda doubt that the factory would mix colors intentionally. My guess is that they were replaced on the car you're talking about at some point, for some reason. I do know when I bought my new GTS off the lot, there were two identical-looking GTS's parked next to each other. Same color combination (green x3) on both. They both had the black letters everywhere. One may have had the black bumble bee stripe, but I chose the other for the test drive, and I liked it so well I didn't look any further.
