I understand. Yes, FitDay is very day oriented. That is a good idea to have a running total deficit for a period time vs. average per day over that period. It would actually help people figure out what their metabolism is also. You could divide total deficit by pounds lost and see if it worked out correctly.
Also, I get your point about the calorie deficit compared to your plan on a daily basis. Let me poke around and see if there is a good place to do that.