help needed with the g29 h shifter

So i just bought a g29 shifter hooked it up and everything, all works fine except the g29 shifter doesn't recognise when i push down and put it in 6th gear to reverse.

in the windows config for it, 6th gear and push down 6th gear both recognises as number 19, when i belive one should be 18 and the other 19

I don't belive it's a wire issue as i've tried many different angles, i'm not sure if it's a little config issue or something inside the hardware.

If a config issue how do i fix this

if a hardware issue how do i fix it again

thanks in advance!