Well... let's see if I can help you figure this out.
From January 1 to March 1, my FitDay (downloaded version) tells me that I consumed an average of 1,422 cals and burned an average of 1,701 cals.
So, theoretically, I should have lost 4.4 pounds from January to March. Did I? No, I did not. As a matter of fact, I went from 149 to 151.
What this means is that FitDay does not tell the whole story.
For one thing, an average alone doesn't say anything about the range of calories I was eating, and the fact that a few days of eating above 1600, for me, makes a big difference! A difference that doesn't go away quickly...
For another, the estimates FitDay has for exercise calories burned are inaccurate, and they run high. In some cases, you're better off not even tracking the exercise calories.
So, I've learned not to trust FitDay for small differences.
I would bet that 1800 calories would not be your maintenance number... You might try some different sites to see what they say--but the fact is, any number is going to be just an estimate. Try:
http://www.freedieting.com/tools/calorie_calculator.htm
When I chose "basal metabolic rate" I get 1225 cals per day. If I choose "little or no exercise" I get a whopping 1471 cals per day. That's close to what FitDay tells me. Exercising 3 times a week puts it up to 1685. Well, that's just a completely ballpark figure, and it doesn't take into account that I used to be obese.
My point is just that when playing with less than 300 calories difference a day, it might be within the margin of error for the estimates and make no difference.
Some people think that Prozac makes it much harder to lose. I have no idea.
So, suggestions form me: Don't go by exercise calories. Don't let the amount of calories eaten vary too much. Drink water. Be patient!
Jay