glow changing my fertile days again...

Brooke • My name is Brooke! I'm 28 years old and have known my hubby since first grade ❤️❤️ttc baby #2.
So I have a 33-35 day cycle and I'm on day 31. This morning glow changed all my days and im not sure why. I had BD three times in my original fertile window and now it moved making it only one day.... why on earth does it change things when I have given it no reason to??