Why do you always get it wrong!!!

Tasha 🇯🇲/🇬🇧 • first 👶🏾 baby due August 2018
Why do you always get my monthly predictions wrong?? Every month I have to manually change them myself and then you change it back so I have to recharge them all over again.
Why can you just not understand that my details I enter each day are correct and just leave hem alone.