Why payouts never match orders
A gateway collects card payments, waits a settlement period, deducts its fees and any refunds or chargebacks, and pays the net amount to your bank. One payout can cover hundreds of orders across several days. The bank statement shows only the net figure.
The settlement report from the gateway is the bridge. It lists each transaction included in a payout, the gross amount, the fee, any VAT on the fee and the net. Download it for every payout; it is your source document.