I'm guessing this episode was from early in the show's run. In the final round of this episode the contestants revealed their votes immediately after locking them in. Later on during the show's run the votes during the final round were kept secret until the end of the video clip. In other words they would lock in their votes early in the clip like they did during the first two rounds, but they wouldn't reveal their votes until the end of the clip. I don't know when the final round's "secret vote procedure" went into effect, but if I remember correctly it was used for most of the show's run.
8:45-8:57, “Join host Deney Terrio, special guest DJ Ed McMahon, judges Dick van Patten, Melissa Gilbert and John Ritter and musical guests Iron Maiden on Dance Fever, Saturday night at 7:30 on WAVE-TV 3!”-Chuck Casteel.