Timed Cycles "Less Time" button doesn't work.

Timer on "Timed Cycles" "Timed Dry" is maxed out at 120 minutes. "Modifiers" "Timed Cycle Adjust" "Less Time" button does not work. Same for "Express Dry" and Rack Dry", though time is not maxed out, setting the time only allows for setting more time, not less. How can I clear the time and or get the "Less Time" button to work?