Faint line but the wrong way round?!

[Bahh]

I'm assuming this is an error but it doesn't say anything on the box. Faint line in the left window but it's horizontal rather than vertical. Thoughts?

You can see that the line also continues through the control line, I would say its faulty :(

I'd say it was faulty and to try another test. The pound shop do them or wilkinsons are good.

I was thinking the same, it did that straight away so thought it was a little too good to be true!