Can anyone better help me understand my OPK results please

Hello everyone! Baby dust to all who are ttcing! This is my 2nd cycle of ttc and my first time using OPKs. So naturally I have a question about CD 13 and 14! It says that I peaked on CD 13 but CD 14 is clearly darker then the control line... can someone please explain why CD 13 is my peak and not CD14 and also when I actually ovulated?