Why is NUYOK transposed from YUKON in Blade Runner?

The movie shows the roof of a hotel as Deckard is being "arrested" and taken to police headquarters and the sign on the roof in the lower right corner of the frame reads NUYOK. Later, when he goes to Leon's apartment, the building is seen from street level and the letters spell YUKON. Was this a goof or the prop director's attempt to make it look like there were more set pieces than they actually had? In the 25 years the movie has been talked about and dissected, no one has ever mentioned this and I've been curious as to why it was done from the very first time I watched. Now I've watched it dozens of times, including all five versions issued in The Final Cut Ultimate Edition, and I'm still curious.