You dont need to ask anyone

Once you get the reference number, update it with whatever address you want

You don't need to keep updating it.

If the agent in MAD would not put the address of MEX in , fine, you can do it yourself.


as i mentioned worldtracer does not update realtime, that is true for all airlines

Yes, BA itself is not good at updating bag status. That is true for all bags, not just delayed bags.

It has no relation to MCT. My experience is my bags that did not make it were well beyond mct. Those near mct have always been fine. Others will have different experience.