Channel Line-up Incorrect

I’ve recently started using the DVR feature since I installed an attic antenna and can tune in a ton of local stations. However, the channel line-up for both CBS and CW in my area are incorrect in Plex (they are correct on the HDHR’s own apps). Both of these stations are broadcast by the same entity in my area. CW’s data is showing on 7.1 whereas it should be on 62.1, and CBS’s data is nonexistent (it should be on 7.1). What are we, the users, to do about correcting this? It’s impossible for me to record from CBS and there are some of my favorite shows on that station (Big Bang Theory, for instance). I’ve seen a few other posts on the same type of situation, but they have gone unanswered. It would be great if we could manually map stations based on callsign.