Turbo Tax is showing 2 different tax liabilities when I click on the "why do I owe $[]" and it is saying I owe more than what it shows on "your tax breakdown" table.

At the "Federal Review" stage I was reviewing the breakdown and Turbo Tax is saying in one place my tax liability is higher and in another place it is lower.  I called and spoke to someone but they mentioned that it might have to do with dividends being taxed at a different rate.  However, the associate didn't seem that sure and it didn't leave me with a lot of confidence.  Has anyone else had the same issue.