It was something fancy I think it’s called the aqua spin
Here is the margin of error for that kit. What you saw as 0.1 for ammonia and nitrite is within the error margin so it is likely 0 in this scenario.
page 15. https://www.apifishcare.com/pdfs/AQUASPIN MANUAL_1615904482.pdf
Compare this to the results you got from them to paint a more accurate picture