Home Mortgage Interest Deduction

After completing the mortgage interest deduction, Turbo Tax indicated that I would have deduction of $27,273.  This is less that the interest I paid, probably because the total mortgages exceed the $750,000 limit.  I worked through the form 936 and came up with a similar number.  However, when I checked Schedule A, TurboTax had entered $33,357, which is the total interest I paid rather than the $27,273 indicated by TurboTax in the mortgage interest calculation.  Seems like an error in TurboTax