itunes plays song repeatedly when on shuffle

Make sure that you do not have Repeat turned on. From the users guide

Play music

Control playback. Tap a song to play it and show the Miniplayer. Tap the Miniplayer to show the Now Playing screen, where you can do the following:

Tap to skip to the next song.

Tap to return to the song’s beginning.

Double-tap to play the previous song in an album or playlist.

Skip to any point in a song. Drag the playhead. Decrease the scrubbing speed by sliding your finger down the screen.

Share music. Tap , then choose a sharing option.

Shuffle. Tap to play your songs in random order.

Repeat. Tap to repeat an album or playlist. Double-tap to repeat a single song.

More. Tap for additional options.

See what’s up next. Tap . Tap a song to play it and the songs that follow. Drag to reorder the list.

Stream music to an AirPlay-enabled device. Tap in Now Playing, then choose a device. See AirPlay.

Hide Now Playing. Swipe down the album art or tap to hide Now Playing.

Try:

- Reset the iOS device. Nothing will be lost

Reset iOS device: Hold down the On/Off button and the Home button at the same time for at

least ten seconds, until the Apple logo appears.

- Unsync/delete all music and resync

To delete all music go to Settings>General>Usage>Storage>Manage Storage>Music>Tap edit in upper right and then tap the minus sign by All Music

- Reset all settings

Go to Settings > General > Reset and tap Reset All Settings.

All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.

- Restore from backup. See:

Restore your device from an iCloud or iTunes backup - Apple Support

- Restore to factory settings/new iOS device