HDFC's fixed-width text statement heads its value-date column Value Dat, cut off at nine characters. ai-bookkeeper strips a trailing three-letter currency code from headers (Amount USD), and it read dat as a currency, so the column became Value, an amount alias. With a real Debit and Credit pair beside it the file booked ₹110.00 out as ₹30,523.00 in, with no warning.
Same sweep of Paisa's sample files (AGPL, read at run time, nothing copied) turned up two smaller faults: SBI's Value Date was preferred over Txn Date, and the line **This is a computer generated statement... was glued onto the last transaction's description. All three are fixed and pinned in tests with made-up rows; the full suite (1,591 tests) passes. None is checked against a real statement yet, and a real HDFC or SBI export is still the thing that would add signal.