Software says I need to upgrade to Deluxe because I need to submit a 1040, but IRS forms say I can submit a 1040A?

The Software says I need to complete a 1040 because I had ABP interest income and thus need to upgrade to Turbo Tax Deluxe. When I look at the 1040A form it says that I absolutely can use that form to file my taxes with teh interest income I claimed. What gives?