Mix sugars with orange zest and cinnamon; set aside. Lightly grease two, 9-inch cake pans. Drizzle ¼ cup melted butter evenly on the bottom of each pan. Divide the sugar mixture evenly between each pan, making sure it coats the bottom. Top sugar with pecans (3/4 cup per pan). Dip rolls one at a time in the remaining butter. Place 12 coated rolls evenly spaced in each pan (9 on the perimeter and 3 in the center). Drizzle with any remaining butter. Let rise in a warm area free from drafts until double in size. Bake in a 375-degree oven for 20 minutes or until golden brown and cooked through. Remove from oven and turn out onto plate before it begins to cool. Repeat with second pan. Syrup is very hot! Let cool and serve warm.