FRER negative but other positive?!

Just wondering if anyone has ever tested 3 days early with a First Response Early Result test (yes, it is definitely that and NOT rapid response!) and gotten a negative result. But with the same urine done a First Response dip and read test strip and gotten a faint positive and been pregnant?? So confused!! 🤷🏼‍♀️

I will be waiting and testing on AF due date- just wondering if it had happened to anyone else!

Also all tests are not expired and only brought recently!