It was probably just a timing thing as I checked your account and it currently shows your total as 1160 calories eaten with a range of 40-390 left for the day. When you do see a small discrepancy of one or two calories, it is caused by how the individual items are rounded versus when they are summed.
As long as you meet or are within your recommended range for the day, you do not need to eat more. So, with your example, if you ate 1,200 calories, you can stop there for the day. We give you a range as a guideline. As long as you consistently stay within that range, you will progress towards your goal. You might be interested to read this linked article that explains how we determine your recommended range:
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