Preheat oven to 350 degrees. Grease sides and bottom of a 10 inch deep dish pie pan. In a medium mixing bowl, mix together flour, salt, baking powder and pudding mix. Mix in butter, egg and milk. Beat for 2 minutes. Pour mixture into pie pan. Arrange the peach slices on top of the pudding mixture. In a small mixing bowl, beat cream cheese until fluffy. Add 1/2 cup sugar and 3 Tbsp. reserved peach syrup. Beat for 2 minutes. Spoon mixture over peaches to within 1 inch of pan edge. Mix together 1 Tbsp. sugar and 1 tsp. cinnamon and sprinkle over top. Bake in preheated oven for 30-35 minutes until golden brown. Chill before serving.