I hope you don't find this question too moronic. I understand the Doppler effect, and red shifting as things are moving away from us, comparable to the change in pitch of a train approaching then retreating... So, if space/time itself is expanding, doesn't this also stretch the wavelength of light further, more noticeable the further it's origin point- or it's properties remain static and it just takes longer to propagate because it has more space to traverse? Wouldn't either of these scenarios affect our measurements or results?