Warning to users of some vendors LCD keypad shields

Hey

I'm really new to all this.

Please could you help me with the display. I've tried to enter the code as is displayed, when I press "right" right is displayed. Pressing "left" displays select. "up" displays down. "down" displays left. And "select" displays nothing at all. I have tried adjusting the numerical values and have got it working except for the "select" button which I cant get to show anything at all. Any ideas why or how to rectify this?

Thanks

Dan