Undecided on the CB but definitely see the other test. Looks faintly pink to me.
If you continue to have these faint lines but it turns out you aren't pregnant I think you should visit your GP. I have read that ovarian cysts (which I also read women with PCOS can have more of) can cause false positives because they can secrete hCG. There are other things too, but they aren't common causes.
You are clearly getting lines on some of these though, and there has to be a reason because they can't all be faulty. I think for your own sanity, if this doesn't turn out to be a pregnancy, it would be good to clarify precisely why you are getting these results