Standard Deduction

I am confused and need help.  Preparing my 2021 taxes and after entering deductions, the application advises me that I am getting the standard deduction of $27,800 but then a few screens later, it advises me (congratulates me) that I am getting the standard deduction of $28,400.  Which one is correct and why am I seeing two different amounts for the standard deduction?  Please advise.  Thanking you in advance.