In medium bowl, mix chicken, 1 cup of the Cheddar cheese, the cream cheese and seasoning mix with spoon, breaking apart cream cheese cubes. Spoon slightly less than 1/2 cup filling onto each tortilla. Roll up each tortilla tightly; place seam side down in baking dish. Drizzle with remaining enchilada sauce. Sprinkle with remaining 1/2 cup Cheddar cheese.