took apart clear blue digital smart countdown

Samantha
Does anyone know if when you take apart the clear blue digital there is always two lines? It's not the weeks estimator one it's the smart countdown one so there is only one strip inside and I believe it only tests hcg not LH. I took it apart ( I know you're not supposed to) but there is a clear second line it's. Its not as dark as the control but it is very clear but it says not pregnant. And I've been getting faint lines on regular tests too...thought I'd take a digital to confirm but these digitals confuse me