From what it sounded like at the time the '08s were being built, the numbering sequence wasn't a formal thing. Apparently, the dashboard plaques simply were stuck on after the stripes were applied. They might have even been in a bin and workers just yanked them out willy-nilly and stuck them on the dashboards. The plaques are more to show the cars are part of a special group than to indicate the order the cars were built in.