vvvvvfl then negative

I took a test yesterday( picture below)and there was a very faint line. It was so faint you had to hold it up to the light to see it so I decided to take the test apart(I know it makes it invalid) and was able to see the line a lot better. It has a light pink color to it, it's just super faint. I decided to test again today and it was negative. No line. Not even a hint of a line. I'm so confused. I'm only 8 dpo so I know it is super early to be testing. I'm just confused as to why I got a vvvvfl then a negative. Both test were frer and came from the same box.