Why Does CS-Cart Calculate Shipping Twice on an Order?

An order may show duplicate shipping charges when products ship from multiple locations, a promotion adds a second method, or custom logic applies both per-order and per-item costs.

What to check

Compare cart package grouping, warehouse assignment, shipping methods, product settings, add-on behavior, and final order totals. Test one product, multiple products, and split fulfillment in a staging cart.

Recommended next step

Clarify whether shipping is calculated per package or order, then align configuration and customer-facing breakdown. Validate tax and refunds for each shipment scenario before deploying changes.

How Informatix Systems can help

Informatix Systems provides CS-Cart ecommerce and shipping configuration services. We can assess the affected workflow, trace the likely failure point, and help plan a practical resolution. Contact us with the system involved, when the issue began, and non-sensitive error details.