I would suggest that you forget that 2480 is theoretically what your body burns at rest (your BMR) and instead listen to the feedback that your body is giving you.
BMR calculators are only averages of what a woman around your age, height, and weight burns in a day. There's about an 800 calorie range of error for each number, meaning that you could be burning considerably more or fewer calories than the calculator says an average woman burns. It's like saying that the average woman is 5'7", so these pants must fit you. Not true if you're 5'2"or 5'11"! Weight loss and BMR, just like pants, are definitely not "one size fits all". In other words, BMR calculators are pretty worthless (IMO).
The only way to measure YOUR metabolic rate is to be shut up in a lab and have your calorie input, exercise, and O2 consumption measured, which is not very practical for most of us! So instead, use the feedback from the scale as your guide to whether you're creating a calorie deficit and burning fat. If you're consistently and reliably tracking your calories and you're gaining weight, your body is telling you that you're eating more calories than you're burning. If you're losing weight, then your body is telling you that you're creating a calorie deficit. And if your weight is staying the same for a long period of time, then your energy input is matching your output.
I think that 1800 calories is a bit on the high side for weight loss and agree with Jay that you might consider dropping them and seeing how your body responds.