TurboTax Roth 401k contribution software error

I have two W-2s with Roth contributions.  The two contributions sum to exactly $30,500.  The amounts are correctly reported in box 12, code AA of the two W-2s.

 

But TurboTax says that I have over-contributed to Roth 401k, saying I contributed $30,501. 

 

Maybe the issue is rounding, but I have to sort it out.  I cannot ask my employer to correct the contributions, since there is nothing wrong on their end.  I cannot fill out the IRS forms to report it, since there is no error.  The error is only with TurboTax.

 

Advice appreciated.