See if the attached file does you any good. I attempted to use it with a zipcode of 57042 and it ran through some of the sites. (You'll save the HPE file after unzipping to some location on your computer, then import it into Sentinel).
It has a Favorites List Quick key of 99 and has been set to location control. That was so it would avoid sites too far away.
If it works, you can edit as desired. Then I recommend getting into your Howard, Lake and Sanborn Favorites List files and deleting the South Dakota State Radio Systems from these FLs. Then, since Kingsbury is in the F99 SD State Radio System FL, I'd delete the Kingsbury FL.
If you aren't receiving any sites, you might try bumping up the range value in your scanner and see if more sites are "pulled in".
You might want to give the other Favorites Lists their own quick key so you can turn them off. That way you won't be attempting to scan some sites multiple times.
View attachment 45944
Best I can tell, that 460.2875 is a mobile extender frequency. So you must have been pretty close to some unit when you received that. I'm thinking all that does is repeat what is heard on the state system in a very limited area.