Andromeda is not a plane with all the stars exactly the same distance away. The diameter of Andromeda is about 220 kilo light years. Granted it is not seen edge on but the distances from Earth of all the 1 trillion stars vary by thousands of light years; which means the amount of time it takes for the light from each of the 1 trillion stars varies by thousands of years.
The Andromeda galaxy is not that remote. Andromeda and the Milky Way are on a collision course. Which means that Andromeda is blue shifted. Go to wikipedia and go to observation data; it specifically states that it is blue shifted.
And I suppose, when you’re not feeling well, you visit your P.G. (pill guy).