Google Analytics Vs Prestahop - Sales Performance

[michael_presta]

Hello, 

 

I linked our prestashop with the default google analytics provided in prestashop. But it seems to record wrong transaction date and time. for example if I list all transaction of the 26th of february, the first transaction ID i see in google analytics

 

http://screencast.com/t/OY4Y8oo4O

 

based on prestashop was really made on 25th of february at 18:17.

 

http://screencast.com/t/n8thhS9F

 

I triple checked the timezone defined in google analytics and prestashop. The transaction date/time are always wrong with a difference of several hours,

 

It's a big problem because I cannot measure the performance for a specific day.
 

Any1 experienced the same problems ?