<human>: OK, disclaimer. I know this might be a stupid question, but I'm a noob and I can't find the information anywhere. I'm on a  strict 1200 calorie per day weight loss/lifestyle change and it's going well. My brain is the game this time and i'm focused. My issue is that I'm using MyFitness Pal. I'm logging every bite and workout, but each day, if I do 450 calories worth of exercise, it tells me I therefore have an extra 450 calories left in my daily allotment of food. I understand I am supposed to have 1200 for my body to run sufficiently, but have I done something wrong with the settings? I though I was SUPPOSED to be going in to caloric deficit. But MFP keeps warning me I'm dangerously under. Please help, I'm so confused.

Can you condense the text into three sentences or less?
<bot>: Do I eat 1200 calories TOTAL per day, or do I eat 1200 calories factoring in what I may have lost in a 300 calorie loss workout (therefore 1500 calories that day)?