nitrite test kit

I wonder if anyone can help me with this one.

I just got new test kits, brand of Laguna.

the nitrite test kits shows results as 0.1 to 3.3 mg/l (ppm)
& the nitrate test as 5-110 mg/l (ppm)

now the nitrate results look they read right. but what am I missing on the
nitrite one? shouldn't that also be in the 1-100 range? not a 0.1?

my results show:
nitrite 0.4
ph 7.5
ammonia 0
nitrate 5-10
kh 60.. yup I know that is low, I just added baking soda

2 weeks ago I emptied my pond, to clean out the sludge in the bottom,, put
back 1/2 the original water ( saved in a BIG container) the rest was rain
water from cistern ( figure that is where the low kh is)

I was trying to do research on here about nitrites & nitrates, and cannot
get a definitive answer on it in my case. I don't have ammonia ( but then I
am testing with the nessler (one bottle kind). & have read that if I had
nitrates things should be cycling ok.

any suggestions?
(gotta check oxygen tomorrow)