Preheat the oven to 400 degrees. Spray an 8 x 8 baking dish with baking spray.
In a large bowl combine the cream cheese, sour cream, 1/2 cup BBQ sauce, chicken, 1/2 cup cheddar cheese, salt, pepper, onion powder, and garlic. Mix until well combined.
Spread the dip in the prepared pan.
Combine the remaining BBQ sauce with the buffalo sauce and pour over top of the dip.
Combine the remaining cheddar cheese and crushed RITZ crackers together. Sprinkle over top of the dip.
Bake for 20 minutes or until the mixture begins to bubble and the cheese is melted on top.
Serve hot with RITZ crackers and TRISCUIT crackers.