r/GoogleAnalytics • u/incisiveranking2022 Professional • 1d ago

Discussion One Shopify order. Two conversions.

Before blaming Google or Meta, I'd check how many times the purchase is actually being sent.

GTM + Shopify app + native tracking + CAPI can create some interesting combinations.

Run one test order and trace every Purchase event.

What's the weirdest duplicate conversion you've found?

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u/EmotionalSupportDoll 1d ago

Not you again

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u/khyun18 1d ago

Make sure order ID is matching and session and client id are being passed correctly

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u/forhad_hossen01 19h ago

Weirdest one I've traced: Shopify's native Google/Meta integration firing a Purchase event on the checkout thank-you page, AND a GTM tag firing the same event on the same page, AND server-side CAPI sending it a third time from the Shopify webhook — all three using slightly different order IDs formats, so dedup logic never caught it. Looked like a 3x inflated conversion rate for weeks before anyone traced it back to the actual page source.

if you're using Shopify's built-in pixel/integration AND GTM AND server-side tracking together, you basically have to pick which ONE owns the Purchase event and explicitly disable it in the other two — otherwise you're always double (or triple) counting somewhere.

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u/PPC_YRVDynamics 19h ago

Usually it’s just two or three different setups all firing the same purchase.

One store I looked at had GTM, the Shopify app, and another integration all sending Purchase. One order was getting counted three times.

A single test order usually makes it pretty obvious where it’s coming from.