Hey @kennycwa 

Welcome to the Klaviyo Community and congrats on your first post! 

Just to make sure I understand correctly, you have a custom integration with Klaviyo and your ordering platform. You have also created “Placed Order” and “Checkout Started” triggers. Generally, we do not offer support on custom integration and recommend working with your developer to pinpoint the challenges. If you need help from a developer you can connect with one of our Partner Agencies. However, I do have a couple questions to help you get the correct variables to use in your emails.

• Are the “Placed Order” or “Checkout Started” metrics being added to profiles in Klaviyo? These profile properties will not work if it is not already added to at least one profile in Klaviyo.
• Did you pull the variable syntax directly from a profile? The variable added to profiles are specific to your integration, therefor other integration’s (ie Shopify) template tags will not work. 

Hope this helps you begin to figure out what the challenge is. Thanks again for being part of the community!