Like I said, it is a darn interesting question. In the case of the Falls Church, the property was donated to the Anglican church prior to the American revolution.
I don't know that another title transfer has been recorded.
My understanding of Virginia law, which I believe trumps canon law, is that a congregation, on voting to leave a demonination carries its church property with it. I would be interested to know what entity is listed on the title for Falls Church, and the other congregations of the old Truro Parish.