AVA BRACELET HELP!!

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I got my peak opk on the 14th so I assumed I ovulated on the 15th. On the 15th I had some pretty intense one sided ovulation pain and ewcm so I thought I was on track. I did however experience one sided O pain and slight ewcm for days leading up to the 15th but they were pretty intense on (what I expected was) O day.

Looking at my Ava recordings today it’s saying it has detected a biphasic pattern. Can anyone clarify this for me? It’s saying it’s confirmed ovulation on the 13th so would you say that’s correct or should I follow my gut and stick with the 15th?