Glow changed my previous ovulation date

💜Marty🌼👣💫🐻❤️🌈 • Marty💜 Catherine💚Kane 6/09/17 Eli 7/13/05 💙Taelon 11/6/08 💙Miles 12/18/10 💙Daxton 9/2/13💙👼Nokose 3/7/19 - 6/2/19 💞🙏💔 🌈👣💜 Malani 🌼 Due 6/9/20

When I entered the data for AF today glow moved my ovulation date up by a week. Is it accurate? We BD a lot so we might have caught it but I only wonder because I was five days late. Is it because of the luteal phase? My bleeding is super light too.