Not sure if I can post images, but will try as it's easier with screen shots.
Normal view with no icons:
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Touching the centre of the screen once will bring up the following icons at the top of the screen:
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The icon on the far left is the repeat function. (others are: middle two related to Ping's like and comment function, last one on right is shuffle)
If it shows the below image, it means it's set to repeat current song (blue with a 1):
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when that icon is white it means the ipod will just play the album once. If it is blue it will repeat the entire album/playlist, if it is blue with a 1 it will repeat current song.
If you touce the screen does it bring up those icons?