How is that possible ???

Chelsea • Mom to a beautiful little boy. 4.28.16 Jace Ryan 👶🏼😍 8lb 12oz 21.5 inches long Second time mom to another gorgeous boy 2.15.18 Cade Jax 9lb 2oz 21.5 inches long 👨‍👩‍👦‍👦❤️
I use a digital ovulation kit. I got a positive June 9th (cycle day 15). My period is due around the 24th. But today I got another positive ovulation???? Any insight. Negative pregnancy test which I figured since I'm 9dpo