All pos clear blue and all neg first response

has anyone ever had this issue? I have now gotten 2 positive clear blue tests from different boxes - one early detection one rapid test. And I have also gotten 2 negative first response tests. I don’t know if this makes a difference but I do have the bar so if I am pregnant I’d have no idea how far along I am, I have only had it in for about 7 weeks, and waited the recommended week once it was in. Is there anyway the contraception bar can be either making one brand have a false positive or the other having a false negative??