Now maybe this doesn't happened very often ;) but... if you want to set a maximum for the number of volunteers on a task, you can! This means once enough people have filled the slots, it shows as "Full" and no other people can tick the box to help. This can be handy for stopping too many people opting to "man" the bar, rather than clean up the mess after! More to the point, it makes it much easier for people to see which tasks are still available or needing more help. Try it. Click on the task title to view the task details, then edit it and set max appropriately. (These edit options will only be available to event and community managers.)