Total Calories Burned

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Hi,

I wear a Fitbit 24/7 and when at the gym i use a heart rate monitor linked to Endomondo to track total calories burned.

My Fitness Pal never shows the correct calories burned.

As an example of the error that i am seeing; MFP says my sum as -451cal (for exercise) however my actual usage was 697cal (stationary bike).

Total calories burned (using fitbit) was 1229cal + 697cal = 1926cal (then adding my regular body function will come out at around 2600cal burned for the full day.

Why does MFP not show the correct stats for exercise when connected to these apps?

Actual show on MFP is:

1500 Goal: 1811 Food - 451 Exercise = 1360 Net

i know i have the stats down using the Fitbit app but i am sure it should be showing on MFP correctly..

Cheers,

Craic