Deficit Goal - (Calories Out - Calories In)=overbudget - math doesn't work

[LazyRunner]

I've read some posts already about this but most of them discuss about the difference in calculation arising from the fact that the day hasn't finished yet.
But my problem concerns the day that has finished already - yesterday.
For yesterday fitbit reports the following (24 hrs done and completely synched):
2154 in
2890 out
1000 deficit goal
What is shown: 881 calories over budget. How this is calculated is what I do not get.

This is as per my calculations:
1000deficit - (2890out - 2154in) = 264 below deficit and over budget.

I can post a screenshot of the same if you want (don't see an option on chrome-android) but I have given all the numbers

Anyone who can throw some light on the rationale behind fitbits calculations?

Thank you!

[RobertoME]

Hello @LazyRunner and welcome aboard to our community. I saw your post and I know when is about the Food plan may be kind a tricky question. I'm saying this because the food plan fluctuate depending of the configuration you have choose. If your plan is set in "Personalized," It will use your past activity history to estimate your calorie burn for the day and increases or decreases that number if you're more or less active then usual throughout the day.

Now as I can see on your Screenshot too, you are using a third party app to log food that might causing this calories fluctuation. So there is something I can suggest: Try to log out from your app and restart your phone. If the issue persist do the following:

1. Log in to your Fitbit Web-dashboard and click Log > Activities. 
2. Verify that the activity was not logged twice. 
3. Turn off Personalized Meal Plans in your Fitbit account. 
4. Wear your Fitbit for all activities ans sync regularly as your food plan updates in real time

Keep me posted how it goes and see ya around.