Quick opk question ladiessss

Massy • Mommy of preemie twins born at 29 weeks with IVF fresh transfer
As I am still new to OPK's and still getting use to reading them. I would like to know after you get a positive opk with two lines or let's say after ovulation do you still get two lines although one is very faint???? I am pretty sure I ovulated around the 18 or 19 and I have taken two OPK's after then and I still see two lines but one is very faint, here is a pic for an example from today's opk. Thanks in advance :)