Wonder weeks app

So I downloaded the wonder weeks app a while back because ladies here recommended it. I put my LOs estimated delivery date in instead of her birthday like I’m supposed to since she was a week early. But it’s sooo wrong!! Days where she’s predicted to be fussy she’s so good and sleeps so well. Yesterday was predicted to be a good day and she fussed more than usual and hardly slept at all. Anyone else have this happen?? All the reviews say this app is so accurate...