Help with daily calorie intake

Hi All

So after reading/posting on another thread I am super confused about my daily calorie intake! Ive always set it as 1500 per day and the last month or so I have fluctuated between a few pounds, in the last two weeks ive also im increased my hiit training and got a fitbit so have been eating some if not all of my exercise calories as i thought this is what I had to do....Last night I amended my goals to lose 2lb a week (I have about 28lbs to lose), the App asks are you "not active, lightly active, active or very active", I thought this referred to exercise activity so I selected active and this gave me a calorie goal of 1290 per day.

So my question is can I eat back some of my exercise calories if needed?

So today for example it was 1290 calorie goal, I ate 1297 in food but according to fitbit I gained an extra 527 calories from my exercise but should I have eaten some of those exercise calories?

I think I may be eating more than I should! I weigh everything and log everything but Ive been eating 1500 plus my exercise calories so anything from 1400 - 2000 a day depending on what exercise ive done and what ive eaten!

Thanks
Xx