Once your Santander statement is uploaded, what you get back depends on which export format you actually need next. The only format that matters is the one your next step demands. After the statement is processed you can choose Excel, CSV or QBO as the export target. The same transaction table maps cleanly into any of them without extra reshaping, so a single upload delivers the file your workflow actually expects.
When a Santander statement you need to convert spans more than one page, Convert·Into merges every page into a single transaction table rather than treating each page as its own file. A statement that spans many pages is still one statement. The engine reads page after page without treating each sheet as a separate document, so the running balance carries across a page break exactly as it does on paper. What comes back is one continuous table, not a handful of disconnected chunks.
If the running balance on your Santander 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 printed closing figure on the statement is the source of truth: the engine checks the running balance against it line by line. If a row does not add up it is flagged for review, not dropped, so nothing is silently discarded. The converted file earns your trust because every figure is confirmed against what the bank itself stated.