Whichever order your Banca Nazionale del Lavoro statement prints its columns in, each one still has to land in the right place once it reaches a spreadsheet. Before the export runs, every column the engine finds is mapped to its correct destination. Dates, narrative text, debits, credits and balances are aligned so that incoming fields land in the columns your accounting package or spreadsheet expects; nothing is lumped together and nothing is dropped silently. You review the mapping before you download, which means a misaligned date or a payee field placed in the wrong column is visible and correctable in advance rather than discovered during reconciliation.
If the running balance on your Banca Nazionale del Lavoro statement does not add up row by row, that is exactly the kind of mismatch Convert·Into is built to catch rather than pass through silently. The engine then verifies the running balance against the closing figure printed at the bottom of each page or the last line of the statement. It checks every row in sequence: an opening balance plus a credit minus a debit must equal the next row's carried balance. A row that fails the check is flagged individually instead of the whole file being rejected, so a single misread digit in one transaction does not block the rest of the data from reaching your export.