Preheat the oven to 350 degrees F. Coat the bottom of a 13" x 9" or similar sized baking dish with non-stick cooking spray.
In a large mixing bowl, combine 1/2 cup of chili sauce with the water. Add the oats, egg, diced green chilis, Worcestershire, chili powder, cumin, garlic powder, oregano, and black pepper. Mix well. Add the ground beef, ground pork, bell pepper, onion and corn and mix well. Use your hands to work the mixture until all the ingredients are completely incorporated.
Divide the meat mixture in half. Lay half the meat mixture in the prepared baking dish, forming into a football shape. Create a shallow well so that the edges are higher than the center. Layer shredded cheese on top of the meat along the center, staying about 1/2 inch away from the edges. Cover completely with the 2nd half of the meat mixture forming a domed top and sealing the edges. Bake, uncovered, for 50 minutes.
Meanwhile, combine 1/4 cup chili sauce with smoked paprika in a measuring cup or small bowl. After initial baking time, pull baking dish out of the oven and carefully spoon out and discard the excess grease from the dish. Spread the glaze over the top of the meatloaf and return to the oven to bake about 15 minutes longer, or until a meat thermometer inserted in the center of the meatloaf registers 165 degrees F. Allow the meatloaf to stand for 5-10 minutes before slicing.