This typically happens when you upgrade or migrate between PrestaShop versions. Because order totals tables and their underlying accounting logic can vary between PrestaShop versions, order sums aren’t always calculated and stored the same way from one version to the next, which can cause differences in your order totals after migration.
If you notice significant discrepancies, please review your tax settings, discount rules, and shipping configuration on your new store to make sure they match your original setup, since these factors also affect how order totals are calculated.
If you have other questions or inquiries, please contact our Support Agents via live chat or email us at [email protected].