Since we don't have a way to tell for certain how KXGN got its network feeds, they may well have not been directly interconnected and had to take feeds from other stations and then be subject to those stations' schedules. That happened quite a bit in the pre-satellite years; I came across those circumstances several times when researching some of the UHF History site articles.
In retrospect, I can see that the discussion would have been helped if I'd noticed that KXGN's schedule for both CBS and NBC programming largely mirrored that of KTVQ Billings and KRTV Great Falls, both of which had a dual CBS/NBC affiliation at the time. The only difference I notice off the top of my head is the NBC evening news, where KXGN runs local news at 5:00 pm and then presumably airs NBC on a tape delay of a half-hour (KTVQ/KRTV carried CBS and NBC news back to back), and various tape-delayed programming in the 10:30 hour when both of those stations are running
The Tonight Show. A few programs were unique to KXGN.
I can only say in my defense that the listings in the
Billings Gazette weekly TV magazine are
very hard to read, in that they have a hodgepodge of channel slugs (rounded-off
TV Guide-like, as well as thin squared-off slugs, with no consistent pattern as to black or white background), not unlike the way the actual Montana "real"
TV Guide was cluttered, and any pattern of common scheduling escaped my notice. The "clutter factor" as to
TV Guide channel slugs got worse as the years went by, and stations were added. That edition would have benefited from
TV Guide's listings editors sitting down, taking a deep breath, and saying "
okay, let's redo the channel slug arrangement so that, at the very least, all stations in a market have the same style of slugs". By the 1990s the Montana
TV Guide had descended into a hellscape of black, white, and split slugs with no real rhyme or reason, and somewhere along the line, the Salt Lake City stations, with their white numbers on striped backgrounds, such that the channel numbers seem to jump out at you in 3-D from the background and grab your attention, fell out of the lineup entirely.
TLDR, KXGN was basically a semi-satellite of whichever station, KTVQ or KRTV, was the mothership of the multi-station network serving Montana, with local programming and a bit of syndication (such as
Lidsville) inserted here and there. This picture one might get (no pun intended) of this tiny little station, deep in the prairie, frantically chasing after multiple feeds, and running VTRs to beat the band, isn't quite accurate.