When you say dried sweet orange extract do you mean dried sweet orange peels or an actual powder that you will not be removing from the brew? When adding flavorings to the beer that you will remove such as peels or things like 'grains of paradise' and other citrus you add them in for the last 3 to 7 minutes of the boil depending on the flavor you are going for. I tell people to think of what they add to their beer the same way you think of brewing a cup of hot tea--leave the leaves in too long and you are left with an acrid bitter tea.