Your sales report shows the gross amount. Your bank shows what actually arrived. The difference is almost always made of the same few things.
Platform fees are deducted before the transfer, so the deposit is smaller than the sale. Timing matters too: a payout can land in the next month.
Refunds and chargebacks reduce a later payout rather than reversing the original one, which is why a single deposit can cover several orders.
The fix is to reconcile payout by payout: gross, fees, adjustments, and the deposit that landed.