From what I remember you get crosshairs after 3 days of temps that are higher than your cover line. By about .1 degree I think.
CD 13 looks like it may have been o day,however there are some higher temps prior to that day. Do you know why they are higher? I know a bad sleep, taking your temp later than usual, horomone fluctuations, medication, or alcohol can cause your temp to rise during your cycle and make bumps in your chart.