FF advanced VS FAM O date help

Sorry, I don’t really check CM or do OPK, I’m temping to avoid pregnancy and usually rely on temps only. I had FF set to advanced and told my husband I got crosshairs on CD 18 💦 but today when I changed the settings because the temps were kind of rocky after “ovulation” and FAM gave me crosshairs on CD 19 instead!! 🤦‍♀️ going off temps, which seems to be the more likely O date?

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