Wireless wheel multiple buttons activated

hi im trying to buiild my own wheel using the bluetooth module im following the diagram on wiiki , when i press any buttons im getting multiple buttons detected on screen . any solutions?

can you draw how you have connected a button?

This kind of button only needs a ground connection and the other pin will got to a input pin on the module. You have more than one wire?

i have connected one more button ground wire to this button