Looking around the UBB control panel, things look strange. So I am going to roll back to 7.2.2 both in files and the last backup of the DB I pulled right when I started the upgrade, and go though the upgrade again. Hopefully things will turn out better this time. Thankfully our hosting provider provides adequate space that I can make many backups of all sorts of things.
I will post again on this thread to update as to how this turns out this time.