Fix the shuffle

[BPCG4L]

The shuffle seems to be based on which song you choose to play in a playlist.  It doesn't seem to be random as it should. Every time I play a certain song the same songs will play after it, which is a little annoying.  It also makes shuffle useless to me. As I do not want to listen to the same group of songs all the time.  Please make the shuffle more random. 

EDIT: I notice this happening on iOS. Specifically my iPhone 4

[user-removed]

This problem still persists. There seems to be no intentions to fix it? I have iPhone 4S and others my friends have also the same problem who use Apple products. I heard changing the cell phone manufacturer would solve the problem.