You need to remove your Shopify Pixel and Shopify Conversions API as they will conflict with Pixel Conversions API and result in deduplication problems and unreliable event tracking. Just two easy steps needed to do this task. Follow Step 1 and Step 2 in the image below.
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This link is for customers that have manually installed their Facebook Pixel Code Snippet directly into their theme.liquid file. https://help.shopify.com/en/manual/promoting-marketing/analyze-marketing/facebook-pixel#change-or-remove-a-facebook-pixel-from-your-online-store
James (Tech Support)
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Thanks again from all of us here at Pixel Conversion Pro and remember, you are Awesome!