NM 64, US 64, What's the Difference?

Incorrect labeling of US 64 as NM 64 in Taos

The post and arm for the overhead signal mast at the US 64-NM 68 intersection in Taos have three signs designating the routes. Above, the sign on the post correctly points to NM 68 and US 64 for westbound US 64 traffic. But look up on the mast arm (below), with signs intended for northbound NM 68 traffic. They show the route as NM 64.

Incorrect labeling of US 64 as NM 64 in Taos (close-up)

These photos were taken in May 2008.