Ama, I see you’re from Australia. I’m pretty sure there was a huge thing over there about One Step ICs giving false positives. Here in the UK they seem much less problematic. I have been using them for a year and a half by the time we got our sticky baby, and only one gave me a false positive.
OP, I also found Blue cross tests I ordered from Amazon were good. They were much more consistent with lines than One Step. One Step were ok, but for consistency they were all over the place! Also I found with One Step my afternoon pee worked best