Start button not changing to Update after 1099 info entered

I'm entering Wages and Income, in the Interest and Dividends section. Entered all my 1099-INT, 1099-DIV, 1099-OID, etc.  However, the buttons next to Interest and Dividends topics still say Start (blue color). No matter what I do, they don't change to the grey Update. Any ideas on how to get this to work correctly?