The map I have from 2020 (the one I posted) doesn't have any site names with decimal points in them, you must have a diff map and can you provide it. Also why are you playing this mystery game with me? Also, I listed the sites I am aware of in my OP and NONE of them are anywhere near Demotte.
If you're reading about many different sites on the same system. If there is a decimal, the first number before the decimal is the Region. Indiana has two regions; 1 = North, 2 = South. Other states may only have 1 Region, or may have several. For SAFE-T, Site 1.1 = Region 1 Site 1 = Lake Co simulcast. Site 1.8 = Region 1 Site 8 = Porter Co Simulcast, and so on. Look at your map again, the key is divided into North and South. You're looking for North sites 1, 8, 17, and 91. As you'll find out, they in fact do surround Demotte; and you've learned how to read Site numbers.
Why is teaching you how to read Site numbers important?... go to each one of those sites in the RRDB, and look at their Neighbor List (NL) aka Peer list. That list is given with sites numbers that include decimals.
Read the neighbor/peer list on sites 1, 8, 17, 91. Excluding Site 1 (because that list isn't populated yet) Sites 8 and 17 are a neighbor of Site 91. Generally, not always, but generally, on SAFE-T, if a site is a neighbor of another site, then it will also carry that county's talkgroups when applicable.