welcome to the forums.
The information shown in the top row of a SoundBridge's display when a station is played is not provided by Radio Roku but by the station's streaming server which usually sends so-called metadata with the audio stream. In case of WBGL and WCIC the metadata consists of the artist's name and the song title divided by a hyphen but without spaces which makes the information a bit difficult to read (at the moment WBGL shows "Chris Tomlin-Waterfall"). The same information is shown on the status page of the shoutcast server
To change that you'll have to modify the configuration of your server.
The second row of a SoundBridge's display shows the station's name which in my opinion is correct in case of WBGL and WCIC.
As Frank already stated you can't be a moderator for a subset of stations.