Google AdWords and Facebook Advertising Attribution

Hi there,

I was wondering if anyone saw any large discrepancies between what was reported in estimated conversion values in both Google AdWords and Facebook Ads. I look at the Tessitura reports that correlate with the day of conversion and it seems that there can be several thousand dollars difference in conversion values/revenue.

Does anyone experience this?

I've made sure that the conversion pixels are only placed on the receipt page; Tessitura support has said that their support for both are limited and that it is best to consult the forum.

Any advice?

Much appreciation.