Going over somewhat is fine if you're still losing. It's just that being too far under is not good. Your body will sence it's starving and you'll stall. Too many calories is only bad if you're stalled because of it. Remember a calorie is calorie is not true. If it's too many calories because of protein veggie carbs and fat it's used differently than bad carbs. If you're stalled with too many calories, try cutting back on the fat a bit and make sure you're not eatting more protein than you need. 1600-2000 calories if you're moderately active is not too many at all!!