Hello @Shiroyasha,
Welcome back to the Community!
If you haven’t already, I would recommend taking a look through our Troubleshooting Your WooCommerce Integration Help Center article.
Of those 5 orders that you’re seeing on WooCommerce, do they all have a processing status? Keep in mind only orders that are in the processes status will be synced to Klaviyo as a Placed Order event. This means that orders with other status such as a manual order, pre-order, etc. would not be synced to Klaviyo.
Do you happen to have a single page checkout process? As I’ve explained in the previous Community post I included below, we suggest using a multi-step checkout process since using a single page one may bypass Klaviyo’s ability to track a started checkout event.
I would also suggest investigating the integration between WooCommerce and Klaviyo. Since it sounds like there are some discrepancies in the data synced to Klaviyo and the error you’re getting; this typically indicates an integration error that needs to be repaired.
I would recommend first try re-installing and making sure your plugin is up to date. If that doesn’t work to fully remove (not disable) the WooCommerce integration and run through the integration process again.
I hope this helps!
David