Feature request – Firetask - Project-oriented GTD Task Management for iPhone Review

I have just started using this app and I really like it. It has all the ways of organizing my to do list that I need. By topic (project) - for planning/making sure everything is on the list; by type (phone calls, errands, to dos) - for efficiency; and by both Due date and priority - for sorting the most important items to the top of the list. However, I have yet to find a task management system that adequately handles lengthy (multiple-days) tasks. I would like to see an additional field for either 1) duration - with the sort order being based on the calculated "start date" or 2) "do date(s)" - which would be the days you plan to work on it. I am currently handling these tasks by entering them twice (or three times) and putting the do date in the due date field and entering the actual due date in the notes field.
Review by CariSay on Firetask - Project-oriented GTD Task Management for iPhone.