When you adjust a pledge, in particular when you add an additional designation(s) to a pledge (because donors always seem to change their minds), we want to ensure that users do not have the ability to adjust previous payments that may have been applied to the pledge. When adjusting the pledge designations, the edit installment designations window opens. In that window, you can adjust the payments if you change the installment designation for payments that have already been applied to the pledge. We realize that some BB clients may like this ability, but for us we want to ensure that these previous payments do not get adjusted inadvertently.