Thankyou all for your replies.

Juleswa, your answer didn't add to my confusion it cleared everything up and made me understand my chart a hell of a lot better. Today i've gotten the crosshairs and you were spot on!! You've made it so much easier for me. Thanks again. From the looks of my chart now, i doubt we are pregnant this month, but that's ok, i've been given the heads up for next month.