Iphone not giving right song I clicked?

Okay so I own an iphone 5s and you'd assume that having the latest iphone to date, you wouldn't have many technical problems at all with it

but when I were to mix around my music in a playlist and then go press a song and stuff to see what the song sounded like etc
(I Dj for parties so this is crucial haha)
nah but yeah when I press a certain song on the playlist to listen to, it gives me the wrong song and plays a different one to what I asked for, why?
how do I fix this cluster ****

Did you try restarting the phone? Could just be a glitch.