Problems with frer?

Is anyone having problems with frer lately? I keep (thinking) I'm getting faint lines on other tests but nothing on frer? I don't know whether it's just me imaging it or whether they're indents but I've taken 2 different tests a few times now and lines keep showing. I took all these at the same time tonight ....

I also took this test early on but the dye ran so I didn't check it until half an hour later so I know it's invalid but it did have a faint line.