I don’t understand my ovulation date calcul with Glow

Krl • Blessed with an amazing 3yo, and his 2 little brothers (mono/di) since November! My boys 💛🧡❤️

Hello!

I´m a new Glow user, and I updated my basal temp info today.

What I don’t understand is why my « official » ovulation date is two days before my last drop of temp (before it went through the roof).

Can anyone help me with this?