Accuracy of Clear Blue anything

Today I am one day late and 13 DPO. I woke up this morning and took a clear blue non-digital test. Very quickly I got a vfl. I know that blue tests are less reliable and I’ve used blue before and gotten evaps before. This didn’t look like that as it was a thick (albeit) faint line and appeared immediately.

Fast forward to this afternoon and I pick up some clear blue digitals on the way home. It says 99% accurate on expected AF, and that you don’t have to use FMU. So I tested and got a negative.

What’s the deal? Is this brand just totally not reliable or am I reading wrong or early testing or what? I’ve been happy with their opk, so I expected that I would have consistent hpt results.