Yeah, it looks now it's either the tests or the ammonium chloride recommended dosage isn't adding up the ammonia level it claims it it would. I wouldn't buy another ammonia test, unless you want one but I'd instead get an ammonium hydroxide bottle with a known concentration/percentage of ammonia, calculate how much you need to dose for a certain volume of water taking into consideration any substrate or decoration, etc.. then test with the two tests you have. You can't really know now unless you are sure how much ammonia you are actually adding.