Faint line after 8 hrs on hpt?

So the picture is 10mins after and It didn't look like it was done processing due to the pink line through the middle so I went to bed and the next morning out of curiosity I looked at it again(didn't take a pic of it) and there was a noticeable faint line. I know your suppose to disregard what it says after so long but do those line appear after it dries even if not pregnant?