From what I know about them the feint lines do not mean you are ovulating - but the dark line means that you are - the ones that I used siad that a feint line was negative but a dark line was positive and you were o'ing. The ones that I used also said not to use first morning urine as it was to strong - I cant remeber the brand I was using but they worked that cycle for me!!
Hope that helps and hasnt confused you more!
Kate