Do you have the batch number by any chance? I would really like to avoid that particular batch if possible! Sometimes you get faulty batches and it sucks hugely. I just posted my wonky CB early in your other thread. As I said, with those I haven't had such clear lines before except for once where the line was only half there. For the most part you can rely on pink dye tests I find, but occasionally they do screw up too. I have had some One Step ICs which were also wonky before but mostly they're ok