my ipod no longer sorts songs alphabetically

My itunes is fine. But my ipod no longer lists songs alphabetically. It mixes the As with the Bs, Bs with the Cs and so on. The bar on the view screen that indicates which letter of the alphabet is being displayed is randomly placed in the middle of a letter. Sometimes songs from the end of the alphabet are listed randomly in the middle of a different letter. Also, my search functions don't always work. Sometimes songs that I know are on my ipod don't show up in the song view. I search the artist view, sometimes that helps, sometimes not. Then I switch to the album view, again, sometimes this helps. Often I need to use the search bar at the top of the screen. Today I typed in a song name and got zero results, then a few seconds later the entire screen changed and the song showed up.I have tried restoring my ipod, syncing my ipod, rebooting my ipod, nothing has helped. My ipod has become exceedingly dyslexic. Help.