The car stereo plays the same first song from my USB device whether or not in shuffle mode

When Shuffle play mode is enabled or disabled, playback begins with the first song (determined alphabetically for letters, numerically for numbers, and in symbol order based on UTF-8) in the Music folder of the USB device.

NOTE:

• iPhone/iPod does not support Shuffle play mode.
• During shuffle play, only Repeat Track can be selected, and Repeat Album cannot be selected.
• During shuffle play, the list display on Music Center (SongPal) is not available. To enable the list display, cancel Shuffle play mode.
• If you set Repeat play mode to Repeat Track while Shuffle play mode is enabled and then press the next button, Repeat play mode is canceled, and Shuffle play starts from the first song in the Music folder.