OVULATION DATE ?!

Had shown me my ovulation date was Monday 6th, had sex on 5th late at night,

Partner was meant to start period 19th according to app, hasn’t started so I’ve been removing it and saying she hasn’t it’s now 22nd still no period looked back and it’s now saying ovulation date was the 9th when it wasn’t cause I screen shot it and it was 33% chance high at the time ad the red heart is there?

I understand them changing future ovulation dates and period for following month but why is that one changed? Is it cause I’m saying she’s not started 🤷🏽‍♂️ so bloody confusing this app. Has it worked for anyone using this app?!