Shopify-Meta Pixel Expert for Tracking Fix

Need Shopify + Meta Pixel Expert to Fix Duplicate Purchase Events & Tracking Issues

We are running Meta ads for our Shopify store and facing a serious tracking issue after recent DNS/thank you page changes.

Current Problems:

* Meta Ads Manager is showing fake/duplicate purchases
* Example: Ads Manager shows 4–5 purchases but actual Shopify orders are 0–1
* Purchase events are being duplicated incorrectly
* Campaign optimization is getting affected due to wrong data

Issues visible in Meta Events Manager Diagnostics:

* Duplicate Purchase events
* Mismatched price and currency data between Meta Pixel & Conversions API
* Invalid price information for InitiateCheckout events
* shopifypreview domains appearing in Events Manager
* Possible thank you page reload issue triggering multiple purchases

What I Need:

* Fix duplicate Purchase event issue
* Ensure Purchase event fires ONLY once after successful order
* Proper Meta Pixel + Conversions API deduplication using event_id
* Fix InitiateCheckout value/currency mismatch
* Remove unwanted shopifypreview domains/issues
* Verify accurate Shopify → Meta event tracking
* Test complete purchase flow properly

Platform:

* Shopify
* Meta Pixel
* Conversions API
* FlexyPe payment integration