But then you're leaving out Kirksville, Hannibal, Cape Girardeau....I suppose I had in mind "everything in Missouri that isn't St Louis or Kansas City-St Joseph".
From long experience, I can tell you that Columbia, which is just about dead-even halfway between Kansas City and St. Louis, is ever so slightly more oriented toward St. Louis than Kansas City.Missouri is a fairly unique state in that it has two very large cities on each end and a vast area in-between that doesn't neatly fit into either the South or the Midwest --- it's very much "its own thing". (It's worth noting that the state is even split between two Federal Reserve districts.)
If Columbia had gotten cable TV at the same time as Moberly and Jefferson City, it probably would have imported the Kansas City affiliates as well as the St. Louis affiliates and KPLR, just as those other two systems did. But one of the local newspaper publishers did everything he could to stop it. In the end, the franchise was finally awarded in 1976, and only the St. Louis network affiliates plus Kansas City's independent KSHB were imported to Columbia. Both Kansas City and St. Louis PBS stations were also imported.
The "Missouri" edition of TV Guide became much less useful at that point for people in Columbia and was not all that useful for people in the other mid-Missouri communities, either. It would have been a toss-up whether the Kansas City or the St. Louis edition would have been a better fit for central Missouri; I give the nod to St. Louis since it had no other markets in its edition.
Places like Sedalia are a whole other story; I believe Pettis County is now in the Kansas City market, though it's bounced back and forth between that and Columbia-Jefferson City. The status of KMOS-TV always muddied things up. (Milton Hinlein's revenge, it might appear.) When it re-emerged as a PBS station in 1979, it went into the "Missouri" edition.