1) Why would they change their calls just because the studios aren't physically in Fort Smith? They are licensed to Fort Smith because the FCC assigned them that city of license, and they cover that city. That is all that matters.
2) San Jose is has a bigger population than San Francisco, yet SF is listed first. Virginia Beach has a bigger population than Norfolk, yet Norfolk is listed first. Scranton has a bigger population than Wilkes-Barre, yet Wilkes-Barre is listed first. It's not a big deal.