When did I O?

Yesterday I entered my peak opk and it changed predicted O form 02/14 to 02/15. Today I put my on the way down OPK test and Predicted O got changed back to the 14th. Yet when I look at my OPK analysis it says ‘fading result ovulation is just around the corner’ I’m so confused! We BD 12,14,15th. Hopefully we did enough!