Sorry if I missed it, but what is the nitrite reading you are getting?
Really weird that all that seeded media didn't provide an instant cycle for you.
I'm sure the API master test kit isn't the most accurate thing around, but I wouldn't consider it crap. It's suited most of us well in the hobby just find for decades.
If your water supply used chloramine as opposed to chlorine as a disinfectant, this will show up as a small amount of ammonia, which will convert to nitrates quickly in as established aquarium.