TurboTax filled values for MO-A Line 8 do not match US Government obligations data entered on 1099-INTs (box 3) and 1099-DIV (during interview). Any ideas why?

I've checked the forms for the 1099-INTs and 1099-DIVs and the data appears to be entered correctly but the values that TurboTax calculated are not the sum of the US Government obligation data entered, e.g., the Missouri AGI worksheet has the correct values for Spouse interest and dividends (lines 2 and 3) but the Spouse amount on the MO-A is larger than the sum of these numbers.  How could the interest from US Government obligations be larger than the total interest and dividends?  The Taxpayer values are not correct either but are smaller than they should be.