The low-carb, low calorie days and mornings are what burn fat. If you eat more carbs and more calories, you will not burn as much fat, and the bulk you put on will have more fat. Ergo, if you are serious about keeping the fat off, YOU HAVE TO KEEP CARBS AND CALORIES DOWN.
It sounds like what you should really be doing is just more workout days and thus more backloads. If you're not at 5 days a week yet that is