I'm on the screen showing Your income & expenses. The amount shown for Investments and Savings is different than when I go into that section and add up each item. Why?

When I click the "Add/Edit" button, then manually add all items shown the amounts are different. The difference isn't a lot (~300) but any difference is concerning. Is there some other hidden amount TurboTax uses to compute the amount shown on the "Your income and expenses" page?