Why is it when i select a song on my iPhone, it plays a different song?

Ok so say my song list on my phone is:

Just Lose It
Loud
R.I.P
Lose Yourself
Sail

So if i select the song "R.I.P", it will start to play the song "Loud" - the one right above it. And say if i select that song "Sail" it will play the song "Lose Yourself"… Please help and let me know if this has happened to you.

PS; I an on an IPhone 4 with IOS 6.1.3

IToys are no good, get a blackberry Z10.