It depends - You may want to check with the provider of your 1099-INT before you enter your information since there is usually only supported to be one amount in box 1. Also check that the 1099-INT printing alignment was not off (where the second number printed in box one but was actually supposed to print in box 2).
If everything is correct of the 1099-INT, then put the combined total of the 2 amounts in box 1 when entering the 1099-INT information.