The app appears to be sorting trains by line and then by time. Should sort by direction and then time.
When the subway app is used the Tidbyt does not cycle through the available lines. For example, Sterling Street station in Brooklyn has a 2 and a 5 line, but only the 2 line shows up on the actual display. Should show the next departing train to Manhattan and to Flatbush on the 2 line and 5 line.