Clearblue Advanced vs. Regular OPK

Jessica

I usually don’t ovulate until CD 14-16. I started using Clearblue advanced in addition to the traditional OPK. I never got high fertility on clearblue but yesterday, CD 10, got peak with clearblue. Traditional OPK is still showing low. Is clearblue mistaken or did I actually ovulate early? Obviously, having sex anyway, just curious!