Charting question re O date


Hi all

I am a bit at a loss regarding my ovulation date, this is the first month i am charting my temps maybe some more experienced charters can help me out

According to my OPKs and CM I should have ovulated around CD12 but FF is giving me CD 15 as my O day, possibly cause I did not input enough temps before I Oed? :confused: :confused:

Any opinions pls?