This all sounds vaguely familiar, but after 60,000+ comments posted, the details from any one past post get fuzzy and my crystal ball has once again been sent out for repairs. (never can seem to get that thing to work when I need it to...)
Care to describe your tables and relationships in a bit more detail?
So your relationships are still:
Is this is still a filtered portal that shows only the most recent move?
And you are trying to sort Persons records by a field in Move?
If so, that won't work due to the portal filter. (It will sort by the value of this field from the record that you'd see in this portal if it weren't filtered.)
Let me know if all of the above is correct before I suggest a way that will work.
Yes, all of the above is correct. I started to learn Filemaker only for this one database and I don't change anything you told me without your permit :)