I have gotten in the habit of running the Delete and Recreate Database each time I add, remove or update channels and/or sources. If your sources are set up correctly, it will completely refresh your guide data, and confirm that scheduled recordings for your passes are updated, especially if any of your channel numbers have changed.
As @chDVRuser has mentioned, it won't help if there's a problem with one of your sources. That's when you'll need to do a little more investigating into your DVR and container logs. 

Debrid Channels