You are the one confused, you are thinking phase shift is disconnected to the here and now and it isn't. But we are measuring the shift from here, it cant be doing both things.<quoted text>
you are the one that makes no sense. you agree about a star 5 million light years away going supernova and not being seen by us here in the now yet but don't understand the same principle applies to the red/blue shifts.
, if the universe were to start collapsing we would know it now , because we would be part of the collapse. If it started collapsing it would start in the now.
Therefore the redshift would turn to blue now.
We would have to see that starting hundreds or billions of ly away , we would see it here.