How to fixed wrong tracking source/medium of conversions

[Ginny Tong]

Hi experts

I have a problem that after upgrading to UA, most of sources to conversions has been wrong.

In our online booking process, at the check-out step, customer will be moved to a payment gateway of third parties (such as paypal or OnePay.vn) then moved back to a page /thankyou.html to confirm successful payment. We set the url /thankyou.html as our conversion goal url. It was working properly before making the upgrade to universal. After the upgrade, most of the source/medium for conversion has become paypal or onepay. And we now no longer to find out exactly the sources of each conversion since the successful payment sessions became new sessions refer from paypal or onepay when return to the url /thankyou.html

Do any of you have this problem? Please guide me how to fix it.

Thank you so much

Best regards,

Ginny Tong

[Ginny Tong]

After posting this question, I found this instruction. https://support.google.com/analytics/answer/2795830?hl=en&ref_topic=2790009

Maybe it's true to my case. Just need to try then I will get back to you all.

Thank you