First Response POSITIVE, Clear Blue NEGATIVE, I'm so confused!!

Positive clear blue but negative first response?? CD 35 DPO unknown : r/TFABLinePorn

Positive clear blue and negative FRER

Faint Positive Pregnancy Test: Are You Pregnant?

Positive clear blue and negative first response?

Faint Pregnancy Test Line: Is it Positive or Not?

I am so confused. Two positive first responses & a negative clear blue : r/tryingtoconceive

Has anyone been a victim of a clearblue false positive ?

Positive first response - negative clear blue

Using Computer Vision to Classify Pregnancy Test Results, by Laura Langdon

First response dip and read