Facebook conversions - issue in calculation

[marcop2]

Hi,

I have a few campaigns for conversions on Facebook, but any of them don't show to me real numbers. There are 4 times more conversions on Facebook than in GA.

I did a little research. The problem is that - Facebook pixel calculates all possible conversions from all sources, and because my campaign results are wrong e.g.:

• Facebook campaign results: Conversions: 10 | Cost per conversion: 1

• GA for that campaign (real numbers): Conversions 1 | Cost per conversion: 1

GA from all campaigns and sources: 10

It's that correct? Pls help. Br. Marco