no...you are making sense.
i am all "duhhhhhhhhhhhhh" because of pms. i always get like this.
i am guessing that its based on an avg body. which unless you have lived in a bed your whole life or are an athelete you could use the info you got to see how it works for you.
i am guessing like a rule of thumb thing. because i can eat more calories than suggested and not gain weight. i am very solid. (145 looks like 125)
i would like to get one of those body fat tests where you go in a tank of water.
but $$$$$$$$$$$$$$$$$$