Just need some insight

I had posted about a line that appeared on a test after a few days. I had posted a picture of them when they were valid but i took a couple tests between then and i think i posted the wrong valid version of the test. I see pink where the line should be but its more like a smudge. What is this? One picture is the line that appeared a few days later, another is it during the valid time, and the other is after i tried to wipe the evap away as someone said that if you put some water on it it will disappear but it didnt. Order of pictures are first picture was the line i saw after a few days, second is after i tried to wipe it away, third is the test during the valid time.