Preheat oven to 350 degrees F. Combine cake mix, 1 egg, and oil in a large mixing bowl; beat at medium speed with an electric beater until crumbly. Reserve 1 cup cake mixture for topping. Press remaining cake mixture into an ungreased 9- x 13-inch pan.
Bake 12 minutes or until lightly browned.
Beat cream cheese at medium speed until creamy; add sugar, 1 egg, and lemon juice, beating until smooth. Pour cream cheese mixture over baked crust; sprinkle with reserved 1 cup cake mixture.
Bake, uncovered, an additional 20 to 22 minutes or until lightly browned. Let cool slightly; cover and chill. Cut into bars.