Your own temple covenants don't change
Is a person bound by the specific wording used at the moment they personally entered into the temple covenants? Even if the ceremony is updated later, does a person's original oath remain the 'active' version for their life? For example, are those of us who made the death oaths still subject to those oaths even though they were removed from the ceremony later? It seems to me that when you return as a proxy, you are merely a vessel for the deceased; you aren't 'updating' your own contract to the new version, you are fulfilling a different contract for someone else. The Church also teaches that participating in these ordinances for the dead serves as a "renewal" of your personal covenants, but what does that mean? They had me stand in for dead husbands in temple marriage sealings when I was single, four years before I was married in the temple myself. That's certainly not a renewal.