Hey ladies. So I took a FRRR earlier today and swore I saw a faint line. (First two pictures- not sure if the camera caught the line or not)

So I held my pee for a while and took a second test (last two pictures) and there’s definitely a line. Couple questions though-

The line does go all the way up and down, but is obviously darker in the middle. Does that mean invalid?

And do the FRRR have as bad of indents as the FRER and that’s what it probably is?

I never take the FRRR but that’s all my store had in stock. Any opinions until I can get to another store tomorrow? Thanks ladies!