If a transaction description on your Zenith Bank statement is long enough to wrap across two or three lines, it still needs to land in a single row once converted. Transaction descriptions that wrap across several lines are read as a single entry. The engine groups the continuation lines together before mapping begins, so a long narration does not split into phantom rows or leave orphaned text in your export.
If the running balance on your Zenith Bank 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 verifies the running balance against the statement's own printed closing figure as it processes every row. When a line does not add up, the row is flagged for review and the rest of the file continues untouched. No discrepancy is hidden and no batch is rejected wholesale, so you can trust the export or inspect the outlier without redoing the whole conversion.