I don't use the ammonia/nitrite card much. basically if ammonia shows anything then I know the cycle has started. Then after a few days I check nitrites, if it shows something then great on to nitrates if not then wait till it spikes.
Now the Nitrate card is dumb. The last three or four are all shades of red. The 20 and 40ppm colors I can never tell the diff. Maybe going outside will help.