Is that positive line or evap pic in the comments
There is nothing wrong with their tests I've used them both times with mine. And I do see two lines on your it looks like aa faint positive too me. Test again in three days. Good luck! And please please please DO NOT buy a blue dye test. They are known for false positives and evaps. They are a waste of money!
I think I see something and I never get evaps with those, I’d recommend retesting in two days.