Not necessarily, there might not be any waste products yet. In any case an ammonia drop of that amount definitely wouldn't produce nitrites that are so far off that they skew the vial; the vial would just turn super dark purple.
My 12 could have been wrong - it might be more like 13 or 14. It is awfully hard to peg it perfectly with the API test.
Which means, it's time for a different experiment, right this minute
Deliberately create different concentrations of ammonia. Take ammonia tests, and photograph, and use THIS as my color guide. It suddenly seems obvious that this is what I should be doing already.
Edit: This is going to take at least an hour, so don't wait around