Did your trainer suggest those ratios? If he did, ask him what he suggests for keeping your calories within range. If he didn't, ask him what he recommends for macro ratios.
You did not say what kind of exercise you are doing. You're probably doing cardio since that is easiest to measure the calories burned with a device. The thing is, if you do resistance training and interval training instead (or in addition to), you will change your body in such a way that you are burning more calories when resting than you did for the minutes measured on the device. In other words, 15 minutes of intervals will have you burning calories long after the 15 minutes are over. Intervals and resistance training will also tell your body to build more muscle and mitochondria which will help you burn more calories at rest. You'll probably have to eat more carbs and less fat to support this type of activity, but it will be helpful in the long run.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.