I saw this in a website in the Paragould area also.  I realize that I 57 doesn't go north of Walnut Ridge in Arkansas yet but will eventually connect to Missouri.  This is similar to what I found on that and several other websites.  That is why I removed the US 67 designation.  I even called and asked the Arkansas Department of Transportation (ArDoT) about US 67 being removed before I made any edits.  I plan to do the same northbound as well as southbound between I 40 and Walnut Ridge.  I have used I 57 and I 24 in Illinois to go to and return from Chicago Little Rock via Paducah, KY about 3 years ago.  The websites below and conversation with ARDOT are the reasons that I remove US 67. 
https://www.kait8.com/2024/11/08/highway-67-change-interstate-57/
https://www.kark.com/news/state-news/highway-67-now-designated-as-interstate-57-will-soon-connect-north-little-rock-to-chicago/