Why is GA4 reporting multiple purchase events for a single transaction?

[Joachimgolf]

Hello good people!

I am having issues with the convertion tracking on our page: https://golfsenteret.no/

I have a strange issue where GA4 is reporting 2-4 purchase events on a purchase, which is messing with our convertion rate tracking in GA4. I first thought that the script was firing multiple times, but running through the debug-tool in GA4, the purchase event was only registered once, but GA4 is still reporting 3 events.

I did however notice that during the checkout process, pageview was firing twice on shipping, payment & complete for some reason, but no on inititale_checkout. Though, the purchase event was still only registered once.

GA4 is freshly installed and set up using the Google app in Shopify. I am really scratching my head around this, and cannot find any clear solution to this issue.

Looking in GA4, i can see that the value on engangement -> conversion repports are corrrect vs. the order recieved, but the convertions is wrong. This is 1 order, not 3 orders:

Even more strangely, looking in the convertions overview in GA4, it is repporting the same wrong event count "3", but a completly different value which is totaly incorrrect:

Anyone have any ideas why this is occuring, and how to correct it? It is very infuriating to solve this issue!

[EmmanuelFlossie]

Potentially you have the GTAG installed manually and via an app.

For example if you are using Google Channel, do not self install the tag as well.

[Joachimgolf]

Hello @EmmanuelFlossie !

Thank you for your reply. I cannot find any duplicates of the script when looking at the source on the page, and if that were the case i assume we also would see duplicated events on GA4 trough the debug tool?

[EmmanuelFlossie]

Hi @Joachimgolf for example if you use GTM, and add the code, it will not be visible in the source code.

You would see double events in GA4 yes.

[Joachimgolf]

Hello @EmmanuelFlossie !

Just looked over the source code again, and i can see that both the GTM & Trekkie refrences the GA4-code. I am not 100% sure what Trekkie is in a shopify sense, and i am not sure where Trekkie is firing from within Shopify.

But this could be the issue if both "trekkie" & "GTM" is firing the same code at the same time?

We use both the official facebook & google apps, and within google both the GA4 & G-Ads is set up iwhtin the app. So i would then assume that the GTM that is running is causing the duplicates?

[EmmanuelFlossie]

That sounds correct.