What is happening with my calories??

Options
I haven't used my FitBit for a couple of months. My calories allotment has been set at just over 1700 per day without excersize. Today its all messed up. I have excersize adjustments from my fitbit and I entered an hour of walking. So then my calorie allotment went DOWN to 1500 something???? So I looked back thru the last few days and saw the fitbit updates. LOL Is anyone else having these issues?:noway: