Yes, and I have also used them and seen half lines, which is why I'm not convinced that test was perfect. If the whole thing was a proper line and it was fainter, I would trust that it had at the least worked properly. ICs don't always show progress in leaps and bounds at the start, so I don't see the fact I don't have a super dark line immediately as a negative thing, I would see a fainter or non existent line as a negative thing.
My issue isn't knowing something has started to happen, because clearly something has (the likelihood of seeing the amount of lines I have seen in the previous few days from different tests and different batches all being false, is unlikely), my issue is IF it doesn't progress any further than this again, why that keeps happening and what I can do about it