Sign vs seating chart — two different jobs
Your drag-and-drop seating chart is the planning floor plan: who sits with whom. The seating chart sign is the large poster (or board) at the reception entrance — usually alphabetical by surname with table numbers beside each name.
Filipino receptions with 100+ guests clear the entrance faster when every adult can find their own last name. Grouped-by-table layouts look pretty but slow the line once headcount grows.