Fix the math behind the funding schedule to account for current balance of the expense or goal. Example - a vacation fund goal of $2500. Contributing every paycheck at 150.00/wk. current balance of 1800.00. Got a bonus and contributed 500.00 extra. New balance of 2300. Weekly contribution should recalculate to account for current balance and reduce the weekly contribution. Or if the goal is then upped to say 3000.00 it should recalculate based on starting halve of 2300 and time from change made to goal date.