Fitbit Adjustments too high?

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I recently started using my fitbit to try and help speed my weight loss progress along a bit more and hopefully get a more accurate idea of what I'm actually burning throughout the day.

I work at a camp and am constantly walking to different activities and sometimes I run for about 10 minutes (if I even have the energy after camp) afterwards. Lately my Fitbit adjustments on MFP have been leaving my net lower than 1000 calories and I'm not sure why because on my fitbit, it says that I am eating enough with only 200 or so calories leftover.

My question: Should I be trying to eat more of my fitbit calories back to get my MFP net cals high enough even if that would mean going over what my fitbit says that I've burned? This doesn't really make sense..